Alert archive / Excessive Heat Warnings / 2018
Excessive Heat Warnings in the United States, June 2018
42 excessive heat warnings in June 2018. 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.
- Excessive Heat Warnings
- 42
- Busiest day
- June 29, 201812 excessive 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.
- California35
- Arizona28
- Missouri12
- Illinois10
- Arkansas10
- Texas8
- Nevada8
- Oklahoma7
- Oregon6
- Kentucky5
- New York5
- Minnesota5
- Washington5
- Idaho5
- Michigan4
- Wisconsin4
- Indiana4
- Ohio4
- Mississippi4
- Iowa4
- Connecticut4
- Kansas4
- Montana3
- New Jersey2
- Pennsylvania2
- Tennessee2
- Louisiana2
- Massachusetts2
- Maryland2
- Virginia1
- West Virginia1
- Wyoming1
- Vermont1
- Delaware1
- Rhode Island1
- New Hampshire1
- District of Columbia1
- Utah1
Nearby
Alerts in force nowThe tornado archiveThe radar archive20172019
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.