Severe · Extreme Heat WarningActive alert

Extreme Heat Warning issued September 9 at 2:25PM PDT until September 10

Affecting San Diego County Inland Valleys

In effect until: Sep 10, 2026, 5:30 AM

San Diego County Inland Valleys

Likely impact; effects through 5:30 AM.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

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* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with high temperatures in the 90s to 103 on Thursday with morning
low temperatures in the 70s expected.

* WHERE...San Diego County Valleys.

* WHEN...Until 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events.

* ADDITIONAL DETAILS...Major to Extreme HeatRisk through today.
Moderate to major HeatRisk on Thursday. Warm overnight temperatures
will limit relief from the heat.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Extreme Heat Warning issued September 9 at 2:25PM PDT until September 10

Get the next alert for your area before it matters.

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