Severe · Extreme Heat WarningActive alert

Extreme Heat Warning issued September 8 at 7:01AM PDT until September 9

Affecting Santa Ana Mountains and Foothills

In effect until: Sep 8, 2026, 10:15 PM

Santa Ana Mountains and Foothills

Likely impact; effects through 10:15 PM.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

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* WHAT...High temperatures in the upper 80s and low 90s expected and
overnight lows in the 70s.

* WHERE...Santa Ana Mountains and Foothills.

* WHEN...For the Extreme Heat Warning, until 8 PM PDT Wednesday. For
the Heat Advisory, from 8 PM Wednesday to 8 PM PDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during
extreme heat events. Hot temperatures may cause heat illnesses.

* ADDITIONAL DETAILS...Areas of Major HeatRisk. Very 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 8 at 7:01AM PDT until September 9

Get the next alert for your area before it matters.

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