History of Drought in America

History of Drought in America

Ancient Droughts and Long-Term Climate Records

Drought has shaped North America for centuries, long before modern weather records began. Tree-ring studies and paleoclimate research show that the American West and Southwest experienced severe megadroughts during the medieval period, some lasting longer than many modern droughts. These records help historians compare recent droughts with earlier climate extremes and show that water scarcity has always been part of life in arid and semi-arid regions.

Paleodrought research has also helped explain environmental pressures on ancient societies in the Southwest, including Ancestral Pueblo, Chacoan, and Hohokam communities. These societies developed complex settlement patterns and water-management systems, but long dry periods contributed to social and environmental stress. Modern drought history is therefore part of a much longer story of human adaptation to limited water.

The Dust Bowl and the Great Depression

The Dust Bowl of the 1930s remains the most famous drought disaster in American history. Severe drought, high winds, exposed soil, and intensive farming practices combined to create massive dust storms across the Great Plains. Events such as Black Sunday in 1935 became symbols of environmental collapse and rural hardship.

The Dust Bowl was also a migration crisis. Families from Oklahoma, Texas, Kansas, Colorado, New Mexico, and nearby states left drought-stricken farms in search of work, especially in California. Photographs by Farm Security Administration photographers, including Dorothea Lange, helped make drought migration a central image of the Great Depression.

The disaster changed federal policy. New Deal conservation programs promoted soil protection, shelterbelts, erosion control, and rural relief. Agencies and programs connected to soil conservation grew out of the lessons of the Dust Bowl, making drought a turning point in American environmental policy.

Midcentury Droughts and Water Planning

After the Dust Bowl, the United States continued to face major drought episodes. The 1940s and 1950s brought long droughts across the Southwest, Southern Plains, and Texas. In Texas, the 1950s drought became a “drought of record” that shaped reservoirs, water planning, and later drought comparisons.

The 1960s Northeast drought showed that drought was not only a western or Plains problem. Reservoir shortages and urban water concerns affected states and cities that were often considered water-rich. These events helped expand drought planning beyond agriculture into municipal water supply and regional infrastructure.

Western Water, Reclamation, and the Colorado River

Drought history in the western United States is closely tied to dams, canals, reservoirs, irrigation districts, and interstate water law. Federal reclamation projects such as Hoover Dam, the Central Valley Project, and other western water systems were designed to store and move water through drought-prone regions.

The Colorado River Basin became one of the most important examples of drought and over-allocation. The river supplies farms, cities, tribes, hydropower systems, and ecosystems across the Southwest. Long-term drought since 2000 has exposed the limits of earlier water agreements and forced new drought contingency planning.

Other basins, including the Rio Grande, Columbia, Klamath, Sacramento-San Joaquin, Missouri, and Arkansas-White-Red systems, show how drought affects agriculture, fish, tribes, navigation, hydropower, forests, and cities differently across the country.

California Drought and Groundwater Depletion

California has experienced several major droughts, including 1976–1977, 1987–1992, 2007–2009, 2012–2016, and later twenty-first-century dry periods. These droughts affected farms, cities, ecosystems, reservoirs, snowpack, and groundwater.

The 2012–2016 California drought was especially important because it exposed the state’s dependence on groundwater. As reservoirs and rivers declined, farmers and communities pumped more water from aquifers. This contributed to land subsidence in parts of the Central Valley and pushed California toward stronger groundwater monitoring and management.

Satellite systems such as GRACE and GRACE-FO later became important tools for measuring groundwater loss and total water storage. These technologies changed drought monitoring by showing that drought can continue underground even after rain returns.

Great Plains, Agriculture, and Ranching

The Great Plains remain central to American drought history. From the Dust Bowl to modern flash droughts, the region has repeatedly faced crop losses, pasture stress, livestock impacts, and soil moisture shortages. The Ogallala Aquifer transformed Plains agriculture by supporting irrigation, but heavy groundwater pumping created long-term water risks.

Farmers and ranchers have adapted through crop insurance, irrigation, forage programs, grazing management, conservation practices, and drought planning. Federal farm policy also changed in response to repeated drought losses, making drought assistance and risk management part of modern agricultural systems.

Recent research on ranching and rangeland management shows that drought adaptation is not only technical but also economic and cultural. Ranchers adjust herd sizes, grazing patterns, forage use, and long-term land practices in response to uncertain rainfall.

Modern Drought Monitoring and Science

Modern drought history changed with the creation of the U.S. Drought Monitor in 2000. The weekly map classifies drought from abnormal dryness to exceptional drought and has become a standard tool for tracking drought severity across the country.

Scientists now distinguish several types of drought: meteorological drought from lack of precipitation, agricultural drought from soil moisture stress, hydrological drought from low rivers and reservoirs, ecological drought from ecosystem impacts, and socioeconomic drought when water shortages affect people and economies.

New tools include satellite water-storage data, groundwater well records, snowpack monitoring, drought outlooks, and paleoclimate reconstructions. These tools help show that drought is not a single event but a connected process involving precipitation, heat, snow, soil, rivers, aquifers, ecosystems, and human demand.

Twenty-First-Century Drought and Climate Change

The early twenty-first century brought severe drought across the West, Southwest, Southern Plains, California, and other regions. Studies of the 2000–2021 southwestern drought found that it was one of the driest 22-year periods in more than a millennium. Research also shows that human-caused warming intensified modern drought by increasing evaporation and drying soils and vegetation.

Modern drought often appears together with heat waves, wildfire risk, snow drought, forest stress, bark beetle outbreaks, low streamflow, reservoir decline, and groundwater depletion. Snow drought has become especially important in western mountains because warm winters can reduce snowpack even when precipitation does not fall dramatically.

Recent drought reviews from NOAA, NIDIS, USGS, NASA, and other agencies show that drought remains a national issue affecting the West, Plains, Southeast, Northeast, Alaska, Hawaii, Puerto Rico, and tribal lands.

Drought Impacts on People, Ecosystems, and Public Health

Drought affects far more than rainfall totals. It can damage crops, reduce livestock forage, lower reservoirs, increase wildfire risk, harm forests, stress fish and wildlife, reduce hydropower, disrupt river navigation, and raise food and water costs.

Drought also has public-health consequences. Dust, heat, reduced water quality, sanitation problems, smoke from wildfires, and mental stress can all affect communities during dry periods. Tribal Nations, farmworkers, rural households, and communities with limited water infrastructure may face especially serious impacts.

Ecological drought has become a growing area of concern. Forests, grasslands, wetlands, fisheries, and wildlife habitats may take years to recover even after rain returns. This makes drought history part of environmental history, public-health history, agricultural history, and social history.

Conclusion

The history of drought in America is a history of climate, land use, agriculture, migration, technology, public policy, and adaptation. From ancient megadroughts to the Dust Bowl, from the 1950s Texas drought to modern California and Colorado River crises, drought has repeatedly forced Americans to rethink water, farming, settlement, and environmental management.

Modern science has made drought easier to measure, but climate change, groundwater depletion, population growth, and competing water demands have made drought risks more complex. American drought history shows that drought is not only a natural hazard. It is also a social and political challenge shaped by how people use land, manage water, protect ecosystems, and prepare for a hotter future.

Recent Drought Events and Annual Reviews

A Warm Winter in the West: Understanding the 2026 Snow Drought

| USDA Forest Service | Pacific Northwest Research Station | 2026-04-03

This article explains the 2026 western snow drought, distinguishing between dry snow drought and warm snow drought. It is useful for showing how modern drought history increasingly includes low snowpack, winter warmth, and water-supply stress before summer begins.

Drought in 2025 in 14 Graphics

| NOAA/NIDIS | Drought.gov | 2026-01-15

This visual review summarizes drought across the United States in 2025. It is useful as a recent historical snapshot of where drought peaked, how drought coverage changed during the year, and which regions experienced the most severe dryness.

Assessing the U.S. Climate in 2024

| NOAA National Centers for Environmental Information | NOAA NCEI | 2025-01-10

This annual climate review includes drought coverage statistics for the contiguous United States in 2024. It provides a modern benchmark for comparing drought extent against earlier years.

2024 in Review: A Look Back at Drought Across the United States in 12 Maps

| NOAA/NIDIS | Drought.gov | 2025-01-08

This article reviews drought patterns across the United States during 2024 using monthly maps. It shows how drought expanded, contracted, and shifted regionally over the course of a modern year.

Assessing the U.S. Climate in January 2024

| NOAA National Centers for Environmental Information | NOAA NCEI | 2024-02-08

This monthly report describes how drought conditions changed across the United States at the start of 2024. It is useful for showing regional recovery in some areas and intensification in others.

Climate Migrants of the 1930s Dust Bowl

| Library of Congress | Worlds Revealed | 2023-12-01

This article uses maps and historical context to explain Dust Bowl migration. It is valuable for showing how drought, soil erosion, and economic collapse displaced families during the 1930s.

Western Regional Climate Center Quarterly Impacts and Outlook: Summer 2022

| NOAA/NIDIS | Drought.gov | 2022-09-15

This regional report documents drought impacts across the West during summer 2022. It is useful for showing how the early twenty-first-century western drought affected water supply, agriculture, wildfire risk, and ecosystems.

Drought Baking the Southern United States

| NOAA Climate.gov | NOAA Climate.gov | 2012

This article describes drought across the southern United States, including wildfires, failed crops, and water shortages. It is useful for the history of the 2011–2012 southern drought crisis.

Drought Science, Monitoring, and Definitions

Groundwater Drought in the United States: Spatial and Temporal Variability

| USGS | U.S. Geological Survey | 2026-03-11

This USGS publication examines groundwater drought across the contiguous United States using well data. It is important for drought history because it shows how drought can persist underground even after rain returns at the surface.

US-German Water Satellites Show Continental Dry Spots Are Getting Drier

| NASA/JPL | GRACE Tellus | 2025-08-06

This NASA article explains how satellite measurements reveal long-term drying trends in many regions. It helps connect American drought history to global water-storage loss and modern satellite monitoring.

Drought Defined: A Deep Dive into the U.S. Drought Monitor

| NOAA National Centers for Environmental Information | NOAA NCEI | 2025

This article explains how the U.S. Drought Monitor classifies drought severity. It is useful background for understanding modern drought history after 2000, when the weekly national map became a standard reference.

A Hydrologic Perspective of Major U.S. Droughts

| Gregory J. McCabe et al. | U.S. Geological Survey | 2023

This study identifies major U.S. drought events from 1901 through 2020 using runoff records. It gives a hydrologic framework for comparing the Dust Bowl, 1950s drought, and later national-scale droughts.

The U.S. Drought Monitor and Drought in the 21st Century

| NOAA/NIDIS | Drought.gov | 2022

This page explains the weekly U.S. Drought Monitor and its D0 through D4 categories. It is essential for understanding how drought history has been tracked since 2000.

Historical Drought

| NOAA/NIDIS | Drought.gov | 2020

This overview identifies the longest drought episodes in the U.S. record, including the Dust Bowl drought, the 1950s drought, and the early twenty-first-century drought. It is a key reference for broad drought history.

A Historical Perspective on Drought

| Richard Heim | NOAA NCEI | 2019-08-22

This article compares major U.S. droughts over the last 120 years. It is especially useful for comparing the Dust Bowl, the 1950s drought, and the early twenty-first-century drought by duration, severity, and geographic extent.

The Spatial Footprint and Frequency of Historic Snow Droughts in Yellowstone

| National Park Service | NPS | 2019-09-16

This article uses tree-ring evidence to examine long-term snow drought in Yellowstone. It shows that drought history includes mountain snowpack failures as well as summer heat and rainfall deficits.

In Some Places, Experimental NOAA Models Could Have Predicted Western Snow Drought Eight Months in Advance

| Michon Scott and Rebecca Lindsey | NOAA Climate.gov | 2018-01-23

This article explains snow drought prediction in the western United States. It is useful for modern drought history because it shows how forecasting tools evolved after repeated western water shortages.

Using Enhanced GRACE Water Storage Data to Improve Drought Detection

| R. Houborg et al. | NASA Technical Reports Server | 2011

This NASA technical report explains how GRACE satellite data improved drought detection for the U.S. and North American Drought Monitors. It marks an important shift in drought monitoring from weather stations alone to total water-storage measurement.

Groundwater Depletion in California’s Central Valley

| NASA/JPL | GRACE Tellus | 2011

This NASA page summarizes GRACE-based research on groundwater depletion in California’s Sacramento and San Joaquin River basins. It is important for drought history because it documents long-term water loss beneath one of America’s most productive farm regions.

PSL Scientists Study Historic Dust Bowl and Plains Droughts

| NOAA Physical Sciences Laboratory | NOAA PSL | 2009-10-13

This article explains NOAA research comparing the 1930s Dust Bowl drought and later Plains droughts. It is useful for understanding how sea-surface temperatures, land conditions, and atmospheric circulation contributed to historic drought.

Drought Origins Differ

| NOAA Physical Sciences Laboratory | NOAA PSL | 2009

This NOAA spotlight explains why the Dust Bowl and 1950s drought had different origins and patterns. It is useful for comparing two of the most important droughts in U.S. history.

GRACE Reveals Major Groundwater Loss in California’s Heartland

| NASA/JPL | GRACE Tellus | 2009-02-23

This article reports satellite evidence of groundwater loss in California’s Central Valley. It is useful for showing how drought, irrigation, and groundwater pumping became linked in modern water history.

Droughts Through Time

| NOAA Physical Sciences Laboratory | NOAA PSL | 2002-05-22

This NOAA article places contemporary drought in the context of historical and paleoclimate droughts. It is useful for showing that drought has shaped the American West long before modern records.

National Drought Mitigation Center: Drought Basics

| National Drought Mitigation Center | University of Nebraska-Lincoln | n.d.

This resource explains types of drought, including meteorological, agricultural, hydrological, and socioeconomic drought. It is useful background for categorizing drought events in American history.

National Drought Mitigation Center: U.S. Drought Monitor

| National Drought Mitigation Center | University of Nebraska-Lincoln | n.d.

This site hosts the U.S. Drought Monitor map and archive. It is essential for studying drought history since 2000 because it provides weekly national drought classifications.

U.S. Drought Monitor Map Archive

| National Drought Mitigation Center | University of Nebraska-Lincoln | n.d.

This archive allows users to view drought maps from previous weeks and years. It is useful for reconstructing the history of modern drought episodes.

California Drought, Groundwater, and Water Supply

Data in Action: GRACE and GRACE-FO Are Used by California’s Department of Water Resources

| NASA/JPL | GRACE Tellus | 2024-08-13

This article shows how California uses satellite gravity data to monitor groundwater after repeated droughts. It is useful for the history of drought because it documents the shift from surface-water reporting to basin-scale groundwater accounting.

Assessing the U.S. Climate in July 2024

| NOAA National Centers for Environmental Information | NOAA NCEI | 2024-08-08

This monthly climate summary reports the spread and intensity of drought in July 2024. It is useful for tracking how drought re-expanded in the West, Hawaii, the Plains, and parts of the eastern United States.

California Drought and Water Supply

| Public Policy Institute of California | PPIC | 2022

This article explains California’s recent drought and its water-supply consequences. It is useful for understanding how repeated droughts affect agriculture, cities, ecosystems, and groundwater.

The 1976–1977 California Drought

| California Department of Water Resources | CA DWR | 2021

This article recalls California’s 1976–77 drought, one of the state’s most severe short droughts. It is useful for comparing short, intense droughts with longer multi-year droughts.

California’s 2012–2016 Drought and the Future of Water Management

| Public Policy Institute of California | PPIC | 2016

This article examines how California’s severe drought exposed weaknesses in water management. It is useful for connecting drought history to groundwater reform, conservation mandates, and ecosystem stress.

Early Years of California’s Drought May Be Linked to Lingering Effect of La Niña

| NOAA Climate.gov | NOAA Climate.gov | 2015-04-20

This article explains how La Niña may have helped intensify California’s early 2010s drought. It is useful for understanding the climate drivers behind one of California’s most consequential modern droughts.

Groundwater: California’s Big Unknown

| NOAA Climate.gov | NOAA Climate.gov | 2014-08-27

This article explains why groundwater was central to California’s drought crisis. It is useful for understanding how drought shifted water use from reservoirs and rivers to aquifers.

January Precipitation Deficits Keep California Drought Outlook Grim

| NOAA Climate.gov | NOAA Climate.gov | 2014-02-07

This article documents California’s worsening drought during winter 2014. It captures the moment when low precipitation, poor snowpack, and water-supply fears became statewide emergencies.

High Plains Aquifer Groundwater Depletion

| V. L. McGuire | U.S. Geological Survey | 2013

This USGS report documents groundwater depletion in the High Plains Aquifer. It is useful for understanding how drought resilience through irrigation created another water crisis.

Drought and the Salton Sea

| Public Policy Institute of California | PPIC | n.d.

This article explains the Salton Sea’s water and environmental problems, including the effects of reduced inflows during drought and water transfers. It is useful for connecting drought history to environmental justice and ecosystem decline.

Drought and the Central Valley Project

| U.S. Bureau of Reclamation | Central Valley Project | n.d.

This page explains California’s Central Valley Project. It is useful for drought history because the project was designed to move and store water in a drought-prone agricultural region.

Drought and the State Water Project

| California Department of Water Resources | CA DWR | n.d.

This page explains California’s State Water Project. It is useful for understanding how twentieth-century water infrastructure attempted to buffer California against drought.

Drought and Land Subsidence in California

| U.S. Geological Survey | California Water Science Center | n.d.

This USGS page explains land subsidence caused by groundwater pumping in California. It is useful for showing how drought impacts can permanently alter land and water infrastructure.

California Drought: A Historical Overview

| California Department of Water Resources | CA DWR | n.d.

This page explains drought in California and the state’s water-management response. It is useful for connecting drought history to reservoirs, groundwater, conservation, and emergency planning.

California’s Most Significant Droughts

| California Department of Water Resources | CA DWR | n.d.

This drought overview summarizes California drought history, including major dry periods such as 1976–77, 1987–92, 2007–09, and 2012–16. It is useful for building a chronology of western drought.

California Drought, 2012–2016

| California State Water Resources Control Board | State Water Board | n.d.

This archive documents California’s emergency water-conservation response during the 2012–2016 drought. It is useful for understanding drought as a policy and household-conservation event.

Drought and Western Groundwater Pumping

| U.S. Geological Survey | USGS | n.d.

This USGS resource explains groundwater depletion in the United States. It is useful for drought history because groundwater often becomes the backup supply during dry years.

Western Rivers, Reclamation, and Basin Drought

Soaking Rains and Massive Snows Pile Up in California in January 2017

| NOAA Climate.gov | NOAA Climate.gov | 2017-01-30

This article documents the wet winter that helped end parts of California’s 2012–2016 drought. It is useful for showing how drought relief can come through atmospheric rivers, snowpack recovery, and reservoir gains.

Colorado River Basin Water Supply and Demand Study

| U.S. Bureau of Reclamation | Bureau of Reclamation | 2012

This study examines long-term water supply and demand in the Colorado River Basin. It is useful for connecting drought history to twenty-first-century water planning in the Southwest.

Colorado River Basin Drought

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page explains the prolonged drought affecting the Colorado River Basin since 2000. It is useful for the history of American drought because the basin supplies water to farms, cities, tribes, hydropower systems, and ecosystems across the Southwest.

Basinwide Hydroclimatic Drought in the Colorado River Basin

| USGS | U.S. Geological Survey | n.d.

This study identifies multiple Colorado River Basin droughts from 1901 to 2014. It helps explain why modern shortages are part of a longer basinwide drought history.

Drought and the Colorado River Compact

| U.S. Bureau of Reclamation | Law of the River | n.d.

This resource gathers Colorado River legal documents and background. It is useful for drought history because the compact era assumed river flows that later droughts challenged.

Colorado River Basin Drought Contingency Plans

| U.S. Bureau of Reclamation | Bureau of Reclamation | n.d.

This page explains drought contingency planning for the Colorado River Basin. It is useful for understanding how prolonged drought forced formal shortage agreements among western water users.

Lake Mead and Colorado River Drought

| U.S. Bureau of Reclamation | Bureau of Reclamation | n.d.

This Bureau of Reclamation resource provides historical context on Lake Mead water levels. It is useful for studying how prolonged drought and overuse pushed the reservoir to historic lows.

Drought and American Water Law

| U.S. Bureau of Reclamation | Bureau of Reclamation History | n.d.

This Bureau of Reclamation history provides background on western water development. It is useful for studying how drought risk shaped dams, irrigation projects, and federal water policy.

Drought and the Reclamation Era

| U.S. Bureau of Reclamation | Bureau of Reclamation Projects | n.d.

This project archive documents federal water projects across the West. It is useful for understanding how recurring drought encouraged large-scale reservoirs, canals, and irrigation systems.

Drought and Hoover Dam

| U.S. Bureau of Reclamation | Hoover Dam History | n.d.

This history explains Hoover Dam and Colorado River development. It is useful for drought history because the dam became a key symbol of federal attempts to control western water variability.

Drought and the Rio Grande Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page tracks drought in the Rio Grande Basin. It is useful for understanding drought history along a river central to New Mexico, Texas, agriculture, cities, and international water obligations.

Drought and the Columbia River Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page covers drought in the Columbia River Basin. It is useful for studying snowpack, hydropower, irrigation, salmon habitat, and Pacific Northwest drought history.

Drought and the Klamath Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page covers drought in the Klamath Basin. It is useful for studying water conflict among tribes, farmers, fish, wildlife refuges, and federal water managers.

Great Plains, Texas, Agriculture, and Ranching

El Niño on the Horizon: Can the Warm Phase End Six Years of Drought in the Southern Plains?

| NOAA/NIDIS | Drought.gov | 2026-03-11

This piece places Southern Plains drought in a multi-year context and explains why El Niño can sometimes help break drought in the southern United States. It connects recent drought conditions with earlier drought-ending wet winters such as 1957–58, 1982–83, 1997–98, and 2015–16.

Understanding How Ranchers Adaptively Manage for Drought

| E. Donaldson et al. | USDA Agricultural Research Service | 2025

This research article examines how Great Plains ranchers manage drought risk. It links modern drought adaptation to lessons that emerged after the Dust Bowl and later Plains droughts.

The Causes, Predictability, and Historical Context of the 2017 Northern Great Plains Drought

| NOAA Drought Task Force | Drought.gov | 2020

This assessment analyzes the rapid 2017 drought in the Northern Great Plains. It compares the event to earlier spring-onset droughts and helps explain how flash droughts fit into American drought history.

Farmers Employ Strategies to Reduce Risk of Drought Damages

| USDA Economic Research Service | Amber Waves | 2017-06-05

This article explains how U.S. farm policy and farmer risk management changed after the Dust Bowl. It connects drought history to crop insurance, disaster assistance, irrigation, and conservation practices.

Rangeland Drought: Effects, Restoration, and Adaptation

| Deborah M. Finch et al. | USDA Forest Service | 2016

This report examines drought impacts on American rangelands and grasslands. It links the Dust Bowl to modern restoration, grazing management, and drought adaptation.

Adaptive Management for Drought on Rangelands

| Justin D. Derner and David J. Augustine | USDA Agricultural Research Service | 2016

This paper explains adaptive management for drought-prone rangelands. It helps connect Great Plains drought history to modern ranching practices and climate variability.

Texas 2011 Drought and Wildfires

| NOAA National Centers for Environmental Information | Billion-Dollar Disasters | 2011

This NOAA disaster archive includes the 2011 drought and wildfire losses. It is useful for connecting drought history to billion-dollar disaster accounting.

Drought in the Southwest, 1942–56

| U.S. Geological Survey | USGS Professional Paper 372 | 1963

This USGS professional paper series documents the long Southwest drought of the 1940s and 1950s. It is useful for comparing regional drought impacts before the modern era of satellite monitoring.

General Summary of Effects of the Drought in the Southwest

| H. E. Thomas | U.S. Geological Survey | 1963

This USGS paper summarizes effects of the 1942–1956 drought in the Southwest. It is a classic historical source for understanding midcentury water shortages across California, Nevada, Arizona, Utah, Colorado, New Mexico, and Texas.

1950s Drought in Texas

| National Weather Service Austin/San Antonio | NOAA National Weather Service | n.d.

This National Weather Service page provides context on drought history in south-central Texas, including severe drought periods. It is useful for studying the 1950s drought as a defining event in Texas water planning.

Texas Drought History

| Texas Water Development Board | Water Data for Texas | n.d.

This page summarizes major droughts in Texas history. It is valuable because Texas drought history helped shape reservoirs, groundwater policy, and statewide water planning.

The Drought of Record in Texas

| Texas Water Development Board | TWDB | n.d.

This report explains the mid-twentieth-century drought of record in Texas. It is important for understanding why later droughts are often measured against the 1950s.

The 2011 Texas Drought

| National Weather Service Fort Worth | NOAA National Weather Service | n.d.

This page documents the historic 2011 drought in Texas. It is useful for understanding one of the most damaging modern droughts in the state, with severe heat, agricultural losses, and wildfire risk.

Drought and the Missouri River Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page provides drought context for the Missouri River Basin. It is useful for studying drought effects on navigation, reservoirs, agriculture, and Great Plains water supply.

The Ogallala Aquifer and Drought

| U.S. Geological Survey | USGS | n.d.

This USGS resource explains the High Plains Aquifer, also known as the Ogallala Aquifer. It is useful for drought history because groundwater pumping transformed Plains agriculture after the Dust Bowl but created new long-term water risks.

Drought and U.S. Agriculture

| USDA Economic Research Service | USDA ERS | n.d.

This resource explains irrigation and water use in U.S. agriculture. It is useful for understanding how American farming adapted to drought through irrigation, crop insurance, and water management.

Drought and Crop Insurance

| USDA Risk Management Agency | USDA RMA | n.d.

This page explains drought-related crop insurance and risk-management tools. It is useful for connecting historical drought losses to modern federal farm policy.

Drought and Livestock Forage Disaster Programs

| USDA Farm Service Agency | USDA FSA | n.d.

This page explains federal forage assistance for livestock producers affected by drought. It is useful for showing how drought relief evolved from Dust Bowl-era emergency aid to standing disaster programs.

Drought and the Southern Plains

| NOAA/NIDIS | Drought.gov | n.d.

This regional drought page covers Texas, Oklahoma, and nearby areas. It is useful for studying recurring Plains drought from the Dust Bowl through the 1950s and modern Texas droughts.

Drought and the Missouri River Basin

| NOAA/NIDIS | Drought.gov | n.d.

This regional page covers drought in the Missouri River Basin. It is useful for understanding drought effects on agriculture, hydropower, navigation, reservoirs, and Plains communities.

Drought and the Arkansas-White-Red Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page provides drought context for a major Plains and South-Central river system. It is useful for studying drought impacts on farming, reservoirs, navigation, and municipal water.

Drought and the Great Plains

| NOAA/NIDIS | Drought.gov | n.d.

This regional drought page provides context for Great Plains drought monitoring. It is useful because the Plains are central to American drought history, from nineteenth-century settlement through the Dust Bowl and modern flash droughts.

Major Regional Drought Episodes

What’s the Big Picture for U.S. Drought in Fall 2017?

| Deke Arndt | NOAA Climate.gov | 2017-10-05

This article places 2017 drought conditions within the broader U.S. drought record. It is useful for comparing modern regional droughts against national-scale drought episodes.

A Trio of Drought Hotspots Across the United States

| NOAA Climate.gov | NOAA Climate.gov | 2016-11-15

This article describes simultaneous drought hotspots in California, the Southeast, and other regions in 2016. It shows how U.S. drought can be fragmented across several regions at once.

Drought Is Building in Places Other Than California

| NOAA Climate.gov | NOAA Climate.gov | 2016-08-09

This article tracks drought expansion beyond California during 2016. It is useful for showing how national attention often focuses on one region while drought develops elsewhere.

2012–13 U.S. Winter Recap: Mixed Messages on Drought

| NOAA Climate.gov | NOAA Climate.gov | 2013-03-11

This article reviews national drought conditions after the severe 2012 drought. It shows how winter precipitation provided relief in some areas while drought persisted elsewhere.

The 2012 U.S. Drought

| NOAA National Centers for Environmental Information | NOAA NCEI | 2013

This annual climate report documents the severe U.S. drought of 2012. It is useful for showing how drought affected crops, livestock, heat records, and large areas of the central United States.

The 2002 Western Drought

| NOAA National Centers for Environmental Information | NOAA NCEI | 2003

This annual climate report documents national conditions during the severe 2002 drought. It is useful for understanding early twenty-first-century western drought before the longer Colorado River Basin crisis deepened.

The 1988 U.S. Drought

| NOAA National Centers for Environmental Information | NOAA NCEI | 1989

This climate report documents the major 1988 drought, one of the most costly U.S. drought disasters of the late twentieth century. It is useful for understanding drought impacts on agriculture, heat, and Mississippi River navigation.

The 1988 Drought and Heat Wave

| NOAA National Centers for Environmental Information | Billion-Dollar Disasters | 1988

This NOAA disaster entry documents the economic losses from the 1988 drought and heat wave. It is useful for comparing late twentieth-century drought damages with more recent billion-dollar events.

The 1980 Heat Wave and Drought

| NOAA National Centers for Environmental Information | Billion-Dollar Disasters | 1980

This NOAA disaster entry covers the 1980 drought and heat wave. It is useful for drought history because it shows how drought and extreme heat together produced large economic and human impacts.

The 1977 Western Drought

| NOAA National Centers for Environmental Information | NOAA NCEI | 1978

This climate report provides historical weather and drought context for 1977. It is useful for studying the severe western and California drought of the late 1970s.

Dust Bowl, Migration, and New Deal Conservation

The Real Story Behind the Migrant Mother Photo

| Sarah Pruitt | HISTORY | 2020-05-08

This article explains the history of Dorothea Lange’s “Migrant Mother” photograph. It is useful for showing how drought, poverty, and migration became visual symbols of the Great Depression.

How the Dust Bowl Made Americans Refugees in Their Own Country

| Patrick J. Kiger | HISTORY | 2019-01-04

This article focuses on Dust Bowl migrants and the reception they received in California. It is useful for the social history of drought, showing how environmental disaster became a migration and labor crisis.

What Happened on Black Sunday?

| Jesse Greenspan | HISTORY | 2015-04-14

This article recounts the April 14, 1935 Dust Bowl storm known as Black Sunday. It is useful for showing how one day came to symbolize the terror and scale of the Dust Bowl drought.

The Dirty Thirties Comes to Life

| National Park Service | NPS | 2013-09-17

This article describes interpretation of the Dust Bowl as a major environmental disaster. It emphasizes the combined role of drought, wind, and poor land management.

10 Things You May Not Know About the Dust Bowl

| Christopher Klein | HISTORY | 2012-08-24

This article provides lesser-known details about Dust Bowl migration, settlement, and public memory. It is useful for correcting simplified stories about who moved, who stayed, and how drought affected communities.

Dust Storm Sweeps from Great Plains Across Eastern States

| History.com Editors | HISTORY | 2009-11-24

This article recounts the May 11, 1934 dust storm that carried Great Plains topsoil eastward. It is useful for showing how the Dust Bowl became a national event, not only a Plains disaster.

Black Sunday Dust Bowl Storm Strikes

| History.com Editors | HISTORY | 2009-11-16

This article describes the April 14, 1935 dust storm that became known as Black Sunday. It is useful for a drought chronology because it marks one of the defining days of the Dust Bowl.

Great Depression: Black Thursday, Facts and Effects

| History.com Editors | HISTORY | 2009-10-29

This article includes the role of drought and dust storms in worsening Depression-era hardship. It is useful for connecting the Dust Bowl to the broader economic crisis of the 1930s.

The Dust Bowl: America’s Environmental Disaster

| History.com Editors | HISTORY | 2023

This overview explains the causes, timeline, and impact of the Dust Bowl. It emphasizes the combination of severe drought, exposed soil, high winds, economic distress, and migration.

Dust Bowl: Topics in Chronicling America

| Library of Congress | Chronicling America Research Guide | n.d.

This research guide points to newspaper coverage of the Dust Bowl as it unfolded. It is useful for studying how Americans at the time described drought, dust storms, crop failures, and relief efforts.

Search Strategies and Selected Articles: Dust Bowl

| Library of Congress | Chronicling America Research Guide | n.d.

This selected-articles page gathers historic newspaper items on Dust Bowl drought and relief. It is useful for finding period accounts of drought victims, farm losses, wheat prices, and dust storms.

Voices from the Dust Bowl: The Migrant Experience

| Library of Congress | American Folklife Center | n.d.

This essay introduces recordings and materials from Dust Bowl migrants in California. It is useful for the human history of drought because it preserves voices of people displaced by environmental and economic crisis.

The Grapes of Wrath: Voices from the Great Depression

| Library of Congress | Classroom Materials | n.d.

This teaching resource connects Dust Bowl migration, oral histories, and John Steinbeck’s novel. It is useful for showing how drought entered American literature, memory, and public education.

Agriculture in the West

| Library of Congress | Meeting of Frontiers | n.d.

This essay explains western agricultural settlement and the vulnerability of farms to drought. It provides historical background for why the Great Plains and western farms were so exposed to drought cycles.

Weedpatch Camp

| National Park Service | NPS | 2021-07-06

This National Park Service page explains the Dust Bowl-era migrant labor camp in Kern County, California. It is useful for connecting drought migration to New Deal resettlement and farmworker history.

1935 Dust Bowl

| National Park Service | NPS | n.d.

This National Park Service timeline entry summarizes the Dust Bowl during 1935. It is useful for placing Black Sunday and the worst dust storms within the broader New Deal era.

The American Home Front Before World War II

| National Park Service | NPS | n.d.

This article places the Dust Bowl within the Great Depression and prewar American home front. It is useful for connecting drought to unemployment, migration, homelessness, and federal relief.

The Dust Bowl

| Library of Congress | LOC Primary Source Timeline | n.d.

This Library of Congress overview explains how drought, wind erosion, and overworked land created the Dust Bowl. It is especially useful because it links environmental history to primary sources from the Great Depression.

The Dust Bowl and the New Deal

| Franklin D. Roosevelt Presidential Library | FDR Library | n.d.

This article places the Dust Bowl within the Great Depression and New Deal. It is useful for showing how drought and dust storms intensified economic hardship and helped drive federal relief programs.

Farm Security Administration Photographs and the Dust Bowl

| Franklin D. Roosevelt Presidential Library | FDR Library | n.d.

This guide explains how FSA photographers documented drought, migration, and rural poverty. It is useful for understanding how images shaped public memory of the Dust Bowl.

FSA Vocabulary and the Dust Bowl

| Franklin D. Roosevelt Presidential Library | FDR Library | n.d.

This educational guide defines Dust Bowl, drought, and related New Deal-era terms. It is useful for building simple historical explanations of drought and migration.

The Great Depression: Facts, Causes and Dates

| History.com Editors | HISTORY | n.d.

This overview places the Dust Bowl alongside unemployment, bank failures, and New Deal responses. It is useful background for drought history because the 1930s drought was inseparable from economic collapse.

Dust Bowl References

| USDA Agricultural Research Service | USDA ARS | n.d.

This bibliography lists major works on the Dust Bowl, including historical studies of agriculture, soil, and depression-era hardship. It is useful for deeper research into drought history.

The 1934 Drought

| NASA | NASA Earth Science | n.d.

This NASA resource discusses the extreme 1934 drought in the context of Dust Bowl conditions. It is useful for showing why 1934 is often treated as one of the worst drought years in North American history.

The Dust Bowl and Soil Conservation

| USDA Natural Resources Conservation Service | NRCS | n.d.

This page provides background on the Soil Conservation Service and the conservation response to Dust Bowl erosion. It is useful for explaining how drought changed federal land policy.

History of the Natural Resources Conservation Service

| USDA Natural Resources Conservation Service | NRCS | n.d.

This history explains how federal soil conservation grew out of the Dust Bowl era. It is useful for connecting drought disaster to long-term conservation institutions.

The Great Plains Shelterbelt

| USDA Forest Service | USDA Forest Service | n.d.

This article explains the New Deal-era shelterbelt project planted to reduce wind erosion on the Plains. It is useful for showing how drought and dust storms led to large-scale landscape intervention.

The Prairie States Forestry Project

| Forest History Society | Forest History Society | n.d.

This article explains the Great Plains shelterbelt as a response to drought, dust storms, and wind erosion. It is useful for understanding environmental reform after the Dust Bowl.

Drought, Homesteading, and the Great Plains

| National Park Service | Homestead National Historical Park | n.d.

This National Park Service resource provides background on homesteading and Plains settlement. It is useful for understanding how settlement patterns placed farmers in drought-prone landscapes.

The Dust Bowl in Oklahoma

| Oklahoma Historical Society | The Encyclopedia of Oklahoma History and Culture | n.d.

This article explains the Dust Bowl’s impact on Oklahoma. It is useful for regional history because Oklahoma became closely associated with drought migration and the term “Okie.”

The Dust Bowl in Kansas

| Kansas Historical Society | Kansapedia | n.d.

This article explains how the Dust Bowl affected Kansas. It is useful for studying drought, dust storms, farm losses, and community response in the central Plains.

The Dust Bowl in Texas

| Texas State Historical Association | Handbook of Texas | n.d.

This article explains the Dust Bowl in the Texas Panhandle and surrounding Plains. It is useful for regional drought history and the connection between farming, wind erosion, and migration.

The Dust Bowl in Colorado

| Colorado Encyclopedia | Colorado Encyclopedia | n.d.

This article explains the Dust Bowl’s impact on eastern Colorado. It is useful for understanding how drought and dust storms affected Plains communities beyond Oklahoma and Texas.

The Dust Bowl in New Mexico

| New Mexico History | New Mexico History | n.d.

This article provides regional context for the Dust Bowl in New Mexico. It is useful for understanding drought impacts across the southern High Plains.

The Dust Bowl and American Memory

| Library of Congress | Farm Security Administration/Office of War Information Collection | n.d.

This collection contains photographs documenting drought, poverty, migration, and New Deal America. It is useful for studying how the Dust Bowl became one of the most visually remembered environmental disasters in U.S. history.

Dorothea Lange and the Dust Bowl

| Library of Congress | FSA/OWI Black-and-White Negatives | n.d.

This collection includes Dorothea Lange’s photographs of migrant families and drought-era hardship. It is useful for understanding the visual history of drought and displacement.

Arthur Rothstein and Dust Bowl Photography

| Library of Congress | Prints and Photographs Division | n.d.

This Library of Congress item represents Dust Bowl photography that shaped public understanding of drought. It is useful for showing how images of dust storms and abandoned farms became national evidence.

Drought and the Civilian Conservation Corps

| National Park Service | NPS | n.d.

This article explains the Civilian Conservation Corps and New Deal conservation work. It is useful for connecting drought-era environmental damage to federal employment, reforestation, erosion control, and park development.

Paleodrought, Megadrought, and Ancient Southwest

2000–2021 Was the Driest 22-Year Period Since at Least the Year 800 in the Southwest

| NOAA Climate.gov | NOAA Climate.gov | 2022-03-04

This article summarizes research showing that the early twenty-first-century Southwest drought was among the most severe in more than a millennium. It is central to modern drought history because it links recent drought to paleoclimate records.

Rapid Intensification of the Emerging Southwestern North American Megadrought in 2020–2021

| A. Park Williams et al. | Nature Climate Change | 2022

This article shows that the 2000–2021 southwestern drought became the driest 22-year period since at least 800 CE. It is one of the most important recent studies for American drought history.

Large Contribution from Anthropogenic Warming to an Emerging North American Megadrought

| A. Park Williams et al. | Science | 2020

This study concludes that human-caused warming intensified the twenty-first-century southwestern North American drought. It is central to understanding how modern drought differs from earlier natural droughts.

Unprecedented 21st-Century Drought Risk in the American Southwest and Central Plains

| Benjamin I. Cook et al. | Science Advances | 2015

This study projects increased drought risk in the Southwest and Central Plains. It is useful for linking historical drought patterns to future drought risk under climate change.

North American Megadroughts in the Common Era

| Edward R. Cook et al. | Proceedings of the National Academy of Sciences | 2010

This article reconstructs major North American megadroughts over the Common Era. It is useful for comparing the Dust Bowl and modern droughts with much longer preindustrial droughts.

Medieval Megadroughts and the American West

| Edward R. Cook et al. | Nature | 2007

This scientific article reconstructs long-term aridity in western North America. It is useful for showing that some past droughts were longer than modern droughts, even before human-caused warming intensified drying.

North American Drought Atlas

| NOAA National Centers for Environmental Information | NOAA Paleoclimatology | n.d.

This paleoclimate resource reconstructs drought patterns using tree rings. It is essential for comparing modern American droughts with megadroughts that occurred before instrumental records.

Tree Rings and Drought History

| NOAA National Centers for Environmental Information | NOAA Paleoclimatology | n.d.

This resource explains how tree rings preserve evidence of past drought. It is useful for studying drought history before weather stations and government records.

Paleoclimatology and Past Drought

| NOAA National Centers for Environmental Information | NOAA Paleoclimatology | n.d.

This NOAA page introduces paleoclimate data used to reconstruct drought over centuries and millennia. It is useful for placing American drought history beyond the twentieth century.

Megadroughts in North America

| Lamont-Doherty Earth Observatory | Columbia University | n.d.

This resource explains long-term drought history in North America using tree-ring data. It is useful for understanding medieval megadroughts and their relevance to modern western water planning.

Paleodrought in the American West

| NOAA National Centers for Environmental Information | NOAA NCEI | n.d.

This NOAA resource explains how paleoclimate data reveal droughts before written records. It is useful for comparing Dust Bowl and modern droughts with earlier megadroughts.

Ancient Drought and Ancestral Pueblo Societies

| National Park Service | Mesa Verde National Park | n.d.

This National Park Service resource gives background on Ancestral Pueblo history, including environmental pressures in the Southwest. It is useful for connecting drought history to long-term settlement changes before the United States existed.

Drought and the Ancient Southwest

| National Park Service | Chaco Culture National Historical Park | n.d.

This resource provides background on Chaco Canyon and the ancient Southwest. It is useful for studying how long-term drought and environmental stress shaped settlement patterns in what is now the American Southwest.

Drought, Tree Rings, and the Ancient Southwest

| Laboratory of Tree-Ring Research | University of Arizona | n.d.

This resource explains dendrochronology, the science of dating tree rings. It is useful for reconstructing drought history in the Southwest long before instrumental records.

Drought and the Hohokam

| National Park Service | Casa Grande Ruins National Monument | n.d.

This National Park Service page explains Hohokam history and irrigation culture in the Sonoran Desert. It is useful for connecting drought history to ancient water management in what is now Arizona.

Drought Impacts, Health, Ecosystems, and Adaptation

Changes in Yellowstone Climate

| National Park Service | NPS | 2025-04-18

This article discusses climate change in Yellowstone, including historical comparisons to the 1930s Dust Bowl era. It is useful for understanding how drought history affects parks, ecosystems, snowpack, and fire.

Unfamiliar Territory: Emerging Themes for Ecological Drought Research and Management

| Shelley D. Crausbay et al. | USDA Forest Service | 2022

This report explains ecological drought and how drought affects ecosystems, not just farms and water supplies. It helps broaden drought history to include forests, wildlife, fire risk, and long-term ecological change.

Western Drought: It Ain’t Over ’Til Well, It Ain’t Over

| Deke Arndt | NOAA Climate.gov | 2017-02-02

This article explains why drought recovery can be uneven even after wet weather returns. It is useful for understanding the slow end of the 2010s western drought.

Economics and Societal Considerations of Drought

| Jeffrey P. Prestemon et al. | USDA Forest Service | 2016

This report examines the economic and social costs of drought. It is useful for connecting historical drought events such as the Dust Bowl to modern losses in agriculture, forests, cities, and public health.

Droughts and Climate Change

| U.S. Geological Survey | USGS | n.d.

This USGS article explains how climate change is affecting drought frequency, duration, and severity. It is important for connecting historical drought to twenty-first-century western drying.

Drought

| U.S. Climate Resilience Toolkit | Climate Resilience Toolkit | n.d.

This overview explains drought impacts on crops, forests, wildlife, recreation, water supply, and local economies. It is useful background for understanding why drought history is social and economic as well as climatic.

Drought and Wildfire in the United States

| NOAA Climate.gov | NOAA Climate.gov | n.d.

This article explains how heat and dryness increase wildfire risk. It is useful for modern drought history because many recent droughts are remembered through fire seasons as well as water shortages.

Drought and Forest Stress

| USDA Forest Service | USDA Forest Service | n.d.

This Forest Service resource explains how drought stresses forests and increases vulnerability to pests, disease, and fire. It is useful for broadening drought history beyond agriculture and reservoirs.

Drought and Bark Beetles in Western Forests

| USDA Forest Service | USDA Forest Service Research | n.d.

This research portal contains studies on drought, forest stress, and bark beetle outbreaks. It is useful for tracing ecological drought impacts in the American West.

Drought and Public Health

| Centers for Disease Control and Prevention | CDC | n.d.

This CDC resource explains health risks from drought, including water quality, dust, heat, sanitation, and mental stress. It is useful for showing that drought history includes public-health consequences.

Drought and Drinking Water

| U.S. Environmental Protection Agency | EPA WaterSense | n.d.

This EPA resource explains drought and water conservation. It is useful for understanding household and municipal responses to modern drought.

Drought and Water Reuse

| U.S. Environmental Protection Agency | EPA | n.d.

This EPA page explains water reuse as a drought-resilience strategy. It is useful for showing how repeated droughts changed urban water planning in the United States.

Drought and Tribal Nations

| NOAA/NIDIS | Drought.gov | n.d.

This page provides drought resources for Tribal Nations. It is useful for understanding drought history through tribal water rights, food systems, cultural resources, and climate adaptation.

Drought and the Future of American Water

| U.S. Geological Survey | USGS Water Resources Mission Area | n.d.

This USGS resource explains integrated water availability assessments. It is useful for connecting drought history to current efforts to measure water supply, demand, quality, and ecological needs together.

General Background and Policy

Southwest Drought Briefing: 2000–2021 Megadrought Context

| NOAA/NIDIS | Drought.gov | 2022

This drought briefing places the Southwest drought in historical perspective. It is useful for connecting modern water shortages in the Colorado River Basin and nearby states with long-term climate variability.

The 2007–2008 Georgia Drought

| National Weather Service Peachtree City/Atlanta | NOAA National Weather Service | n.d.

This National Weather Service page summarizes drought history in Georgia and the Southeast. It is useful for understanding the severe water-supply concerns around Atlanta in the late 2000s.

Lake Lanier and the Southeast Drought

| U.S. Geological Survey | USGS South Atlantic Water Science Center | n.d.

This USGS water-science resource provides context for drought and water availability in the Southeast. It is useful for studying how drought affected reservoirs and river basins in Georgia and nearby states.

The 1960s Drought and New York City Water Supply

| New York City Department of Environmental Protection | NYC DEP | n.d.

This history of New York City’s water-supply system provides context for drought planning and reservoir management. It is useful for understanding how the 1960s drought shaped urban water policy in the Northeast.

Drought and the Mississippi River

| NOAA National Weather Service | National Weather Service | n.d.

This National Weather Service resource explains drought hazards, including effects on rivers and navigation. It is useful for understanding drought impacts on the Mississippi River during events such as 1988 and 2012.

Regional Portals and Watershed Resources

Drought and the Apalachicola-Chattahoochee-Flint Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page provides drought information for the Apalachicola-Chattahoochee-Flint Basin. It is useful for studying Southeast drought, interstate water conflict, and ecological impacts downstream.

The 1960s Northeast Drought

| National Weather Service Philadelphia/Mount Holly | NOAA National Weather Service | n.d.

This National Weather Service page gives regional drought history for the Northeast, including the severe 1960s drought. It is useful for showing that prolonged drought can affect humid eastern states.

The Great Northeast Drought of 1962–1966

| U.S. Geological Survey | USGS | n.d.

This USGS drought resource provides context for severe droughts, including eastern water shortages. It is useful for studying the 1960s Northeast drought, which affected reservoirs, cities, and water policy.

The 1999–2002 Drought in the United States

| NOAA/NIDIS | Drought.gov | n.d.

This historical overview places the late 1990s and early 2000s drought within the longer early twenty-first-century drought episode. It is useful for connecting short drought events to longer multi-year patterns.

Southeast Drought, 2007–2008

| NOAA/NIDIS | Drought.gov Archive | 2008

This archive helps trace the major Southeast drought that stressed Atlanta, reservoirs, agriculture, and interstate water politics. It is useful for showing that American drought history is not limited to the West.

2012 Drought: A Nation in Drought

| NOAA/NIDIS | Drought.gov Archive | 2012

This archive preserves drought status updates from the severe 2012 drought. It is useful for following the event as it unfolded across the Plains, Midwest, and West.

The 1949–1957 National Drought

| NOAA/NIDIS | Drought.gov | n.d.

This historical overview identifies the 1949–1957 drought as one of the longest drought episodes in the U.S. record. It is useful for comparing midcentury drought with the Dust Bowl and early twenty-first-century drought.

The 1930s Dust Bowl Drought

| NOAA/NIDIS | Drought.gov | n.d.

This historical overview identifies the Dust Bowl drought as one of the longest and most widespread drought episodes in the U.S. instrumental record. It is a core source for understanding the defining drought of American history.

The 1928–1942 Drought Episode

| NOAA/NIDIS | Drought.gov | n.d.

This article identifies the drought episode spanning July 1928 to May 1942 as the longest major drought in the modern U.S. record. It is useful for seeing the Dust Bowl as part of a longer national drought period.

Drought and the Navajo Nation

| NOAA/NIDIS | Drought.gov | n.d.

This state drought portal provides data and resources relevant to Arizona and tribal lands. It is useful for studying drought impacts in the Southwest, including areas where water access and infrastructure are already limited.

Drought and Puerto Rico

| NOAA/NIDIS | Drought.gov | n.d.

This drought portal tracks drought conditions in Puerto Rico. It is useful for making American drought history more complete by including U.S. territories, not only the contiguous states.

Drought and Hawaii

| NOAA/NIDIS | Drought.gov | n.d.

This drought portal tracks drought in Hawaii. It is useful for showing how U.S. drought history includes island water systems, ranching, wildfire risk, and trade-wind rainfall patterns.

Drought and Alaska

| NOAA/NIDIS | Drought.gov | n.d.

This drought portal tracks drought in Alaska. It is useful for understanding drought history in a northern context, including wildfire, snowpack, permafrost, and ecosystem stress.

Drought and the Great Lakes Region

| NOAA/NIDIS | Drought.gov | n.d.

This regional drought page covers the Midwest and Great Lakes. It is useful for showing how drought affects humid agricultural regions through soil moisture deficits, crop losses, and low streamflow.

Drought and the Northeast

| NOAA/NIDIS | Drought.gov | n.d.

This regional drought page covers the Northeast. It is useful for studying drought in a region often associated with abundant water but vulnerable to reservoir shortages and ecological stress.

Drought and the Southeast

| NOAA/NIDIS | Drought.gov | n.d.

This regional drought page covers the Southeast. It is useful for tracing drought in humid states where water conflicts, agriculture, wildfire, and municipal supply can all be affected.

Drought and the Pacific Northwest

| NOAA/NIDIS | Drought.gov | n.d.

This regional page covers drought in the Pacific Northwest. It is useful for studying snowpack, salmon streams, hydropower, forests, and water supply during western droughts.

Drought and the California-Nevada Region

| NOAA/NIDIS | Drought.gov | n.d.

This regional page covers drought in California and Nevada. It is useful for studying repeated drought cycles, groundwater stress, snowpack loss, agriculture, and urban conservation.

Drought and the Intermountain West

| NOAA/NIDIS | Drought.gov | n.d.

This regional page covers the Intermountain West. It is useful for understanding drought in mountain snowpack, headwater basins, rangelands, and fast-growing western communities.

Drought and the Sacramento-San Joaquin Basin

| NOAA/NIDIS | Drought.gov | n.d.

This watershed page covers drought in California’s central water system. It is useful for studying the interaction of Sierra snowpack, reservoirs, Delta water quality, farms, cities, and ecosystems.

Drought and Flash Drought

| NOAA/NIDIS | Drought.gov | n.d.

This article explains flash drought, a rapidly developing form of drought driven by heat, wind, low humidity, and rainfall deficits. It is useful for understanding newer categories of drought risk in the United States.

Ecological Drought

| NOAA/NIDIS | Drought.gov | n.d.

This article explains ecological drought and its effects on natural systems. It is useful for expanding drought history beyond agriculture and water supply to include habitats, species, forests, and fisheries.

Agricultural Drought

| NOAA/NIDIS | Drought.gov | n.d.

This article defines agricultural drought and its effects on crops, pastures, and soil moisture. It is useful for understanding why many American droughts became farm crises.

Hydrological Drought

| NOAA/NIDIS | Drought.gov | n.d.

This article defines hydrological drought and explains shortages in streams, reservoirs, snowpack, and groundwater. It is useful for studying droughts that continue after rainfall improves.

Meteorological Drought

| NOAA/NIDIS | Drought.gov | n.d.

This article defines meteorological drought as a precipitation deficit. It is useful for distinguishing weather-based drought from agricultural, hydrological, ecological, and socioeconomic drought impacts.

Socioeconomic Drought

| NOAA/NIDIS | Drought.gov | n.d.

This article explains socioeconomic drought, when water shortages affect people, goods, services, and economies. It is useful for drought history because many major droughts are remembered through prices, migration, jobs, and public policy.