Severe · Extreme Heat WarningActive alert
Extreme Heat Warning issued October 1 at 1:12PM PDT until October 8
Affecting San Diego County Inland Valleys
In effect until: Oct 2, 2026, 4:15 AM
San Diego County Inland Valleys
Likely impact; effects through 4:15 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.
Read the original bulletin (official text)
* WHAT...Dangerously hot conditions with high temperatures in the upper 90s to 106 expected. Nights will be very warm with low temperatures mostly in the upper 60s to mid 70s. * WHERE...San Diego County Valleys. * WHEN...From 10 AM Friday to 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™