Severe · Extreme Heat WarningActive alert
Extreme Heat Warning issued September 10 at 12:32PM PDT until September 10
Affecting San Diego County Inland Valleys
In effect until: Sep 11, 2026, 3:00 AM
San Diego County Inland Valleys
Likely impact; effects through 3:00 AM.
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Read the original bulletin (official text)
* WHAT...Dangerously hot conditions with high temperatures in the upper 90s to 105 expected. * WHERE...San Diego County Valleys. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™