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Last Update: 08/01/2026 at 1:00 PM EST
Extreme Heat Attribution And Risk
Coverage from Climate Central, The Guardian, and others
Articles
37
Active Days
136
The Topic
Record-breaking heat in the U.S. Southwest and related attribution studies dominate the cluster, with repeated links to human-caused warming, health risk, wildfire conditions, and water stress. Climate Central's humid-heat work extends the signal into summer by quantifying dangerous wet-bulb conditions and added risk days.
First Article: 03/11/26
Latest Article: 07/24/26
Summary
- A late-March 2026 heat wave in the U.S. Southwest repeatedly set or threatened temperature records, especially in Arizona and Southern California.
- Attribution studies from World Weather Attribution and related analyses consistently link the event to human-caused climate change and estimate much higher odds than in a preindustrial climate.
- The heat signal is no longer framed as a one-off weather anomaly; it is being used as evidence that extreme heat is arriving earlier in the season and outside older planning assumptions.
- Health risk is a persistent theme, especially for people without air conditioning, older adults, outdoor workers, and others exposed to prolonged heat or humid heat.
- Impacts extend beyond discomfort into operational strain, including wildfire risk, snowpack loss, Colorado River and reservoir concerns, and local disruptions such as reduced ski operations.
- Climate Central's later humid-heat reports broaden the cluster from dry heat events to wet-bulb danger, adding a more structured measurement layer for daily climate attribution.
- The reporting mix is unusually coherent: multiple articles reinforce the same core signal using overlapping attribution methods, NOAA-linked observations, and local risk framing.
History
This topic is new, but as new articles are added to it this area will summarize shifts, changes and expansions of the issues.
Featured
07-24-2026
Climate Shift Index analysis forecasts CSI 5 extreme heat and dangerous humid heat across the United States through July 28, estimating at least fivefold human-caused likelihood.
05-13-2026
Climate Central releases Climate Shift Index: Humid Heat estimates of how climate change influences dangerous wet-bulb conditions globally and in U.S. regions.
06-24-2026
Climate Central quantified climate change contributions to dangerous humid heat days in U.S. cities and worldwide using ECMWF ERA5 data and counterfactual attribution.
Timeline: 136 Days
Hover over any logo to see coverage summary, click for full article.
Additional Articles
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Climate Central analyzed 243 U.S. cities from 1970 to 2025 and attributed most observed summer warming to human-caused climate change.
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.
Forecasters predict above normal warmth across arizona in mid march 2026.
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.
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.
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Climate Central provides climate fingerprint attribution tools, including the Climate Shift Index, to quantify human-driven contributions to extreme weather and local flood risks.
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.
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.
Forecasts from the Climate Prediction Center predict a western heat wave starting this weekend in the United States, with Phoenix near 100F.
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.
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 linked an unprecedented U.S. Southwest March heat wave to human-caused warming, raising extreme-heat and disaster risk despite emergency planning assumptions.
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.
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 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.
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.
Colorado reported an unprecedented March winter heatwave when Dillon and Steamboat Springs set warmest-ever records, and scientists said climate change increased event likelihood.
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.
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.
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.
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.
World Weather Attribution linked early-spring extreme heat in Arizona, California, and Nebraska to human-caused climate change, increasing wildfire and health risks.
World Weather Attribution linked a March Southwest U.S. heat wave that broke record temperatures to human-caused warming, during 2026.
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.
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.
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.
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.
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Meteorologists forecast record early triple-digit heat in Phoenix, Arizona from March 18 to March 21, raising health, wildfire, and water-supply concerns.
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.
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.