Extreme Heat Watch map: active extreme heat watches now
There are no extreme heat watches in effect right now. The most recent one in the NWS archive was issued on October 7, 2026 in Arizona.
Dangerous heat is possible in the next few days.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
Active extreme heat watches
None right now. This page updates automatically when the National Weather Service issues a new extreme heat watch.
What is a extreme heat watch?
An extreme heat watch gives advance notice of heat that could reach warning levels, so communities can open cooling centers and people can prepare.
What to do
- Check that air conditioning works and plan where to cool off.
How often extreme heat watches are issued
From 2016 through 2025 the National Weather Service issued an average of 98 extreme heat watches per year across the country, and 139 so far in 2026. Each count is one alert event, which can cover one or many counties.
States with the most extreme heat watches
| State | Average per year |
|---|---|
| California | 31.6 |
| Arizona | 16.8 |
| Oregon | 6.5 |
| Nevada | 6 |
| Washington | 5.6 |
| Mississippi | 4.9 |
| Florida | 4.2 |
| Iowa | 4.2 |
| Texas | 4.1 |
| Minnesota | 3.8 |
| Nebraska | 3.8 |
| Illinois | 3.6 |
| Louisiana | 3.6 |
| Missouri | 3.6 |
| Idaho | 3.2 |