Extreme Heat Warning for Santa Ana Mountains and Foothills Until Thursday
An Extreme Heat Warning is in effect for the Santa Ana Mountains and Foothills until Thursday, October 8, 2026, with temperatures up to 102 degrees expected; residents should take immediate precautions to prevent heat-related illnesses.
Residents in the Santa Ana Mountains and Foothills are advised to take immediate precautions as an Extreme Heat Warning has been issued by the National Weather Service (NWS) San Diego CA. This warning is effective immediately, October 3, 2026, at 6:05 PM PDT, and will remain in effect until Thursday, October 8, 2026, at 8:00 PM PDT.
Dangerously hot conditions are expected, with temperatures reaching up to 102 degrees Fahrenheit. The NWS emphasizes that heat-related illnesses increase significantly during extreme heat events.
To protect against the severe heat, the NWS advises the following actions: Drink plenty of fluids, stay in an air-conditioned room, and stay out of the sun. Residents should also check on relatives and neighbors. It is crucial to remember not to leave young children and pets in unattended vehicles, as car interiors can reach lethal temperatures rapidly.
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