Alert archive / Extreme Heat Warnings / 2026
Extreme Heat Warnings in the United States, May 2026
2 extreme heat warnings in May 2026. Each alert counts once, however many counties it covered. The last few weeks are still filling in as offices finish their follow-ups. The archive of extreme heat warnings reaches back to 2005.
Extreme Heat Warnings by state
Each state shaded by its count. Tap a state for its own archive.
- Extreme Heat Warnings
- 2
- Busiest day
- May 8, 20262 extreme heat warnings
Over time
By day
Days in UTC, the clock the archive keeps.
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Oklahoma39
- California35
- Texas34
- Arkansas33
- Arizona31
- Missouri26
- Kansas25
- Mississippi23
- Louisiana19
- Illinois18
- Georgia16
- South Carolina13
- Minnesota13
- Iowa13
- Kentucky11
- Florida11
- North Carolina11
- Wisconsin11
- Indiana10
- Tennessee10
- Montana9
- Nebraska9
- Nevada8
- Puerto Rico8
- Utah7
- Virginia7
- Maryland6
- West Virginia6
- South Dakota6
- Alabama6
- Ohio5
- New York5
- Pennsylvania5
- Wyoming5
- North Dakota4
- Michigan4
- Connecticut3
- New Jersey3
- District of Columbia3
- Massachusetts2
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.