Last Update: 04/05/2026 at 2:50 PM EST
Record March Heat Threatens West
Coverage from NBC News, Preventionweb, and others
Articles
64
Latest Article
04/03
Active Days
30
Executive Summary
An early, record March heat wave is set to sweep the Western U.S., accelerating snowmelt, raising fire risk, and straining water supplies
- Winter 2025-2026 was the warmest on record across much of the Western U.S.
- A persistent ridge and heat dome are expected to drive two waves of extreme March warmth
- Forecasts show widespread record highs from California to Montana, with some areas nearing 100 to 112 F
- Mountain snowpack is below average in nearly every western basin, with many under 50 percent of normal
- Rapid snowmelt could produce very low April 1 snow water equivalent and complicate runoff timing
- Water supply concerns are rising for the Colorado River Basin, California, Colorado, and the Pacific Northwest
- Elevated fire weather is possible in drought-hit areas, especially along the Rocky Mountain Front Range
Quick Facts
- What: A record March heat wave threatens snowpack and water
- Where: Across the Western United States and Colorado River Basin
- Why: A strong ridge and human-caused warming intensify the event
- Who: Western U.S. residents water managers and forecasters
- When: March 2026 with impacts over the next weeks
Coverage Timeline: 30 Days
Featured Article
World Weather Attribution linked a record-breaking March U.S. Southwest heat wave, including extreme Arizona and Southern California temperatures, to human-caused climate warming.
Additional Articles
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World Weather Attribution and Climate Central assess a multi-week western U.S. heat dome occurring alongside low snowpack, linking climate change to higher heat-wave likelihood and intensification.
A heat dome-based early March heatwave across Arizona, California, and Nevada is pushing record-level temperatures and accelerating snowmelt, with attribution linking higher likelihood and intensity to human-driven warming.
Scientists linked March U.S. record western heat and eastern storms to jet-stream and planetary-wave patterns, with rapid attribution finding human-caused warming increased heat risk.
World Weather Attribution and U.S. NOAA metrics were cited in reporting on a record-breaking March heat wave in the Southwest, tied to human-caused warming.
Western United States faces a March heat wave driven by heat domes and climate warming.
Forecasters expect a two phase March heatwave across the western United States in March 2026.
World Weather Attribution and NOAA-linked record data connect a Southwest March heat wave that reached 112 F on March 20 to human-caused climate change.
Forecast models reveal record western heat and rapid snowmelt driving water management challenges in winter 2025-2026 across the western United States.
Climate Central forecasts March 6 warmth in the central and eastern United States driven by human-caused climate change.
National Weather Service forecasts record March heat wave in Southern California this week.
Forecasters predict above normal warmth across arizona in mid march 2026.
In North America, late-March 2026 western heat wave analysis links extreme temperatures and drought-driven wildfire risk to human-caused climate change and compared events from 2012 and 2021.
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Meteorologists report a persistent heat dome in the western and central United States has broken March temperature records, with eastward expansion forecast by late next week.
Heat dome drives record March temperatures across the US West and Southwest, prompting extensive heat warnings and public health guidance for millions.
World Weather Attribution researchers reported human-caused warming increased the likelihood of a March Western U.S. heat wave by about four times as snowpack and water risks mounted.
World Weather Attribution scientists reported a March US West heatwave with temperatures 30F above average, attributing increased likelihood to climate change.
Martinez Lake and Phoenix, Arizona set record March temperatures during a late-winter heatwave, and scientific analysis attributed increased likelihood to climate change.
A March heat wave across the United States in nearly 180 cities raised record temperatures as human-caused warming increased the probability of extreme heat days.
Climate scientists assessed a Western U.S. early March heat wave as highly unlikely without human induced climate change, linking the event to heightened hydropower, wildfire, and public health risks.
World Weather Attribution reported human-caused warming increased a record-breaking March heat wave in the U.S. Southwest, affecting Arizona and Southern California in 2026.
World Weather Attribution assessed a U.S. Southwest heat dome producing record March temperatures, finding fossil-fuel climate change greatly increased the likelihood and intensity.
Meteorologists report a heat dome pushing record March temperatures eastward across the U.S., and World Weather Attribution links the extreme heat to climate change.
World Weather Attribution linked an unprecedented U.S. Southwest March heat wave to human-caused warming, raising extreme-heat and disaster risk despite emergency planning assumptions.
Gregg Gallina and Jeff Masters reported an eastward-moving U.S. heat dome drove record March temperatures in early April, with attribution work linking much higher likelihood to climate change.
World Weather Attribution linked a late-March western U.S. heat wave to climate change amplification, with record March highs in California and Arizona and elevated wildfire risk.
Meteorologists and climate scientists report a record-breaking U.S. heat dome across 14 states, with attribution indicating human-caused warming made the extremes far more likely.
Colorado faced record-warm March temperatures in a persistent high-pressure-driven heatwave, and scientists said human-caused warming increased the likelihood of such conditions.
Colorado and parts of the West set record warm March temperatures during a high pressure heat dome as scientists assessed increased odds from human-caused climate change.
Scientists and World Weather Attribution linked a March record heat wave in the US Southwest to human-caused climate change as NOAA reports broader extreme-weather expansion since earlier decades.
World Weather Attribution linked a March 2026 U.S. Southwest heat wave that shattered temperature records to human-caused climate change, raising extreme-weather risk and emergency planning challenges.
Climate scientists said a March winter heatwave over Colorado would be very unlikely without human-caused climate change, citing record temperatures and attribution assessments.
Scientists and NOAA analysts report a U.S. Southwest March heat wave broke record temperatures as human-caused warming increased extreme heat risk.
World Weather Attribution analysis, released in March, found human-induced climate change made a western U.S. heatwave about four times more likely and supported record temperatures.
Cal Fire and California leaders respond to record March heat as experts warn wildfire risk rises and Sierra Nevada snowpack declines could reduce late-season runoff.
Meteorologists and climate attribution scientists reported a Southwest-to-Plains heat dome expanding eastward in the United States in late March, with record temperatures and climate-linked likelihood changes assessed by World Weather Attribution.
A mid-March upper-level ridge produced record heat across the U.S. Southwest and central states in March 2026, supporting large Great Plains wildfires.
World Weather Attribution assessed a record-breaking March 2026 heat wave across the U.S. Southwest and northwest Mexico as virtually impossible without human-caused climate change.
World Weather Attribution estimated human-caused climate change made a 18-22 March western North America heatwave about 800 times more likely and about 2.6 C hotter.
Meteorologists report a mid March clash of air masses across the United States producing broad extreme weather with climate change influencing jet stream and heat patterns.
World Weather Attribution linked a March Southwest U.S. heat wave that broke record temperatures to human-caused warming, during 2026.
Climate Central used attribution science to show a western U.S. heat wave was at least five times more likely due to human-caused climate change.
Climate Central released an attribution study on a record March heat wave in the western United States, finding human-caused greenhouse gases increased heat likelihood and associated health and snowpack risks.
NOAA reported record-high temperatures during an early western U.S. heatwave from March 16-23, with forecasts for more records March 24-27 and climate-attributed higher extreme-heat likelihood.
Colorado reported an unprecedented March winter heatwave when Dillon and Steamboat Springs set warmest-ever records, and scientists said climate change increased event likelihood.
Nebraska and parts of Arizona and California faced extreme heat warnings in early spring, with wildfire red flag warnings and climate attribution to human-caused warming.
UCLA researchers report record March heat in the western United States and warn climate change is increasing odds of dangerous summer heat.
World Weather Attribution linked early-spring extreme heat in Arizona, California, and Nebraska to human-caused climate change, increasing wildfire and health risks.
Forecasts from the Climate Prediction Center predict a western heat wave starting this weekend in the United States, with Phoenix near 100F.
Meteorologists report a mid March surge of diverse extreme weather across the United States linked to human caused climate change.
World Weather Attribution researchers said a late winter heat wave across California and the US Southwest would be about once in 500 years without human-caused climate change.
Colorado climate scientists assessed a March winter heatwave with record temperatures as human-caused warming likely increased likelihood and severity.
Meteorologists report mid March US extreme weather across multiple regions linked to jet stream shifts and climate change.
Heat alerts affected 39 million people across California, Nevada, and Arizona as early-season record temperatures raised wildfire and drought risk in the Western U.S.
Scientists linked a record-breaking March heat wave in the US Southwest, including Arizona's 110 F reading, to human-caused climate change and growing extreme-weather risk.
Scientists conducted a rapid attribution analysis in March assessing a West U.S. heatwave, finding fossil-fuel-driven climate change increased event likelihood and harms.
Forecasters in the US West expect a late-March heat dome to break numerous temperature records, increasing heatstroke hazards and intensifying drought-driven wildfire risks.
Climate media coverage is debated as an analysis of U.S. March temperature records across Colorado, California, Arizona, and Washington highlights long-run variability and Pacific drivers.
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World Weather Attribution scientists and National Weather Service warnings followed a record early March heat wave across western US cities during the past week.
World Weather Attribution links record-breaking March heat across the U.S. to climate change as hotter-than-normal conditions are forecast to persist into spring.
World Weather Attribution assessed a US heat dome in the West as virtually impossible without human-induced climate change, after record hottest March temperatures in Arizona and beyond.
A persistent upper-level ridge drove late-March record heat across the U.S. from southern California to the Mississippi River basin, increasing wildfire risk while forecasts call for a milder weekend before a cold front.
Experts report a March heat wave in the U.S. Southwest broke temperature records in Arizona and Southern California, with human-caused climate change identified as a key driver.
Meteorologists forecast record early triple-digit heat in Phoenix, Arizona from March 18 to March 21, raising health, wildfire, and water-supply concerns.