Alert archive / Excessive Heat Warnings

Excessive Heat Warnings in the United States, 2023

607 excessive heat warnings in 2023. Each alert counts once, however many counties it covered. The archive of excessive heat warnings reaches back to 2005.

Excessive Heat Warnings by state

Each state shaded by its count. Tap a state for its own archive.

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Excessive Heat Warnings
607
Busiest month
August304 excessive heat warnings
Busiest day
August 11, 202323 excessive heat warnings

Over time

By month

By state

Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.

1 more states

The busiest days

Days with the most alerts issued, by UTC date.

  1. August 11, 202323excessive heat warnings
  2. August 18, 202321excessive heat warnings
  3. June 28, 202320excessive heat warnings
  4. August 22, 202318excessive heat warnings
  5. July 12, 202317excessive heat warnings
  6. July 27, 202317excessive heat warnings
  7. August 13, 202317excessive heat warnings
  8. July 31, 202315excessive heat warnings
  9. August 4, 202315excessive heat warnings
  10. June 29, 202314excessive heat warnings
  11. August 8, 202314excessive heat warnings
  12. August 9, 202314excessive heat warnings
  13. August 12, 202314excessive heat warnings
  14. August 20, 202314excessive heat warnings
  15. August 25, 202313excessive heat warnings

Nearby

Alerts in force nowThe tornado archiveThe radar archive20222024

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. Rebuilt daily.