Alert archive / Extreme Heat Watches / 2026
Extreme Heat Watches in the United States, August 2026
23 extreme heat watches in August 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 watches reaches back to 2005.
Extreme Heat Watches by state
Each state shaded by its count. Tap a state for its own archive.
- Extreme Heat Watches
- 23
- Busiest day
- August 13, 20265 extreme heat watches
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.
- California25
- Arizona15
- Missouri15
- Kansas9
- Montana9
- Georgia9
- Minnesota9
- Wisconsin9
- Illinois9
- Iowa9
- Michigan7
- South Carolina6
- New York5
- Maryland5
- Utah5
- Wyoming5
- Nevada5
- Washington4
- Pennsylvania4
- Oregon4
- Texas4
- Florida4
- North Carolina4
- Mississippi4
- Arkansas4
- Connecticut3
- New Jersey3
- Virginia3
- Louisiana3
- Nebraska3
- Indiana3
- North Dakota2
- Massachusetts2
- Kentucky2
- Delaware2
- Maine2
- Vermont2
- Tennessee2
- District of Columbia2
- Ohio1
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.