Alert archive / Delaware / Extreme Heat Warnings
Extreme Heat Warnings in Delaware, 2025
2 extreme heat warnings in 2025. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of extreme heat warnings reaches back to 2005.
Extreme Heat Warnings by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Extreme Heat Warnings
- 2
- Busiest month
- June1 extreme heat warnings
- Busiest day
- June 21, 20251 extreme heat warnings
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 2:06 AM EDT | Extreme Heat Warning | PHI | Kent, New Castle, Sussex | 5 days |
| Jul 24, 2:37 AM EDT | Extreme Heat Warning | PHI | New Castle | 40 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.