Severe · Extreme Heat WarningActive alert

Extreme Heat Warning issued October 4 at 11:32AM PDT until October 8

Affecting San Diego County Inland Valleys

In effect until: Oct 5, 2026, 5:00 AM

San Diego County Inland Valleys

Likely impact; effects through 5:00 AM.

Stay in air conditioning if possible. Drink water regularly and check on elderly neighbors.

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* WHAT...Dangerously hot conditions with high temperatures in the
upper 90s to 103 and warm nights with low temperatures in the lower
to mid 70s expected.

* WHERE...San Diego County Valleys.

* WHEN...Until 8 PM PDT Thursday.

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

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

Extreme Heat Warning issued October 4 at 11:32AM PDT until October 8

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