2012–2016 North American drought

2012–2016 North American drought
Name	2012–2016 North American drought
Start	2012
End	2016
Areas	United States; Canada; Mexico
Cause	La Niña, high-pressure ridging, anthropogenic climate change

2012–2016 North American drought was a prolonged period of below-average precipitation and anomalously high temperatures that affected large portions of the United States, Canada, and Mexico between 2012 and 2016. The event intersected with contemporaneous climate phenomena such as La Niña and persistent upper-level ridging over the North American continent, producing widespread agricultural losses, water shortages, and ecological stress. Federal, provincial, and state responses involved emergency declarations, relief programs, and shifts in water management by agencies including the United States Department of Agriculture, Environment and Climate Change Canada, and the Secretaría de Agricultura y Desarrollo Rural.

Background and causes

Atmospheric circulation anomalies tied to a strong spring–summer upper-level ridge over the North American Cordillera combined with a moderate La Niña episode in 2012 and recurrent negative Pacific Decadal Oscillation phases. Teleconnections involving the Arctic Oscillation, Pacific North American pattern, and the North Atlantic Oscillation influenced storm tracks that bypassed the Great Plains, Central Valley (California), and parts of the Canadian Prairies. Concurrent increases in radiative forcing attributed to elevated concentrations measured by the National Oceanic and Atmospheric Administration and assessed by the Intergovernmental Panel on Climate Change intensified heat anomalies, exacerbating soil moisture deficits observed by the United States Drought Monitor and the Canadian Drought Monitor.

Chronology and geographic extent

The drought intensified rapidly in 2012 following record heat and minimal spring precipitation across the Midwestern United States, Texas, and Manitoba. By summer 2012, large swaths of Kansas, Nebraska, Iowa, and Oklahoma experienced extreme drought classifications used by the U.S. Department of Agriculture Risk Management Agency. The 2013–2014 period saw partial relief in the Southeastern United States but persistence in the Southwestern United States, including the Colorado River Basin and California Central Valley, with notable reservoirs such as Lake Mead and Shasta Lake recording low storage. In 2015, drought conditions re-emerged in the Canadian Prairie provinces—Saskatchewan, Alberta, and Manitoba—and extended into northern Mexico states like Chihuahua and Coahuila. By 2016 some regions had recovered following above-average precipitation linked to a strong El Niño event, while isolated deficits persisted in parts of Arizona and the Rocky Mountains.

Impacts on agriculture, water resources, and ecosystems

Crop failures and reduced yields affected staple commodities including corn, soybean, wheat, and cotton, with major impacts in counties centered on cities such as Des Moines, Oklahoma City, Houston, and Winnipeg. The United States Department of Agriculture and the World Bank-linked analyses highlighted sharply reduced production that reverberated through commodity markets monitored by exchanges like the Chicago Board of Trade and the New York Mercantile Exchange. Livestock producers in regions near Fort Worth and Calgary faced forage shortages and herd liquidations. Hydrologic stress decreased inflows to transboundary systems managed under treaties such as the 1944 United States–Mexico Water Treaty and agreements overseen by the International Joint Commission, lowering storage in dams including Glen Canyon Dam and affecting allocations from the Colorado River Compact. Wildfire activity increased in areas proximate to Boulder, Colorado, Fort McMurray, and Los Angeles County, altering ecosystems spanning the Chihuahuan Desert, Great Plains grasslands, and Sierra Nevada forests, with consequences for species monitored by the U.S. Fish and Wildlife Service and the Canadian Wildlife Service.

Socioeconomic and public health consequences

Rural communities in counties surrounding Oklahoma City, Amarillo, and Lubbock experienced declines in farm income and increased reliance on assistance programs administered by the Federal Emergency Management Agency and the Natural Resources Conservation Service. Urban water restrictions in municipalities including Los Angeles, Phoenix, Las Vegas, and San Diego County affected municipal planning overseen by agencies such as the Metropolitan Water District of Southern California and the Central Arizona Project. Public health agencies like the Centers for Disease Control and Prevention and provincial counterparts in Alberta Health Services reported heat-related morbidity spikes in metropolitan areas including Phoenix, Dallas, and Toronto during heatwaves that coincided with drought. Energy production faced constraints: thermoelectric cooling withdrawals declined around facilities near Houston and New Orleans, and hydropower generation from the Columbia River and the Bureau of Reclamation projects dropped, affecting utilities regulated by bodies such as the Federal Energy Regulatory Commission.

Government response and mitigation efforts

Federal relief programs under the U.S. Department of Agriculture provided emergency loans and indemnities, while the Farm Service Agency administered disaster assistance in affected counties. State governors from California, Texas, Kansas, and Oklahoma issued drought emergency proclamations coordinating with the National Guard and state departments of agriculture. In Canada, provincial responses by Saskatchewan Ministry of Agriculture and Alberta Agriculture and Forestry included feed relief and insurance adjustments under the AgriStability program. Transboundary water management involved the International Boundary and Water Commission and consultations under the Boundary Waters Treaty of 1909 for U.S.–Mexico river basins. Conservation measures advanced through partnerships with NGOs such as the Nature Conservancy and the World Wildlife Fund (conservation organization), promoting groundwater recharge projects supported by agencies like the U.S. Geological Survey.

Recovery, legacy, and long-term climate links

Recovery was heterogeneous: reservoirs near Sacramento, California recovered following 2016 precipitation associated with El Niño, while groundwater depletion persisted under regions dependent on the High Plains Aquifer (including the Ogallala Aquifer), influencing subsequent agricultural practices and policies enacted by state legislatures in Kansas and Nebraska. The event informed adaptation strategies promoted by the Intergovernmental Panel on Climate Change reports and research at institutions including NASA Goddard Institute for Space Studies, NOAA National Climatic Data Center, and universities such as Iowa State University and University of California, Davis. Studies linking the drought severity to anthropogenic warming influenced water policy discourse in forums like the United Nations Framework Convention on Climate Change and regional planning bodies including the Western Governors' Association. The 2012–2016 drought remains a case study for integrating climate science, agricultural risk management, and infrastructure resilience across North America.

Category:Droughts in the United States Category:Droughts in Canada Category:Droughts in Mexico