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Extreme Heat Warning for San Diego Coastal Areas Through Thursday

An Extreme Heat Warning is in effect for San Diego County Coastal Areas until Thursday, October 8, with dangerously high temperatures expected; residents should take immediate precautions against heat-related illnesses.

Staff Writer
10/05/2026 · Chula Vista edition

An Extreme Heat Warning has been issued for San Diego County Coastal Areas, effective immediately until Thursday, October 8, at 8:00 PM PDT. Residents are advised to take precautions against dangerously high temperatures.

The National Weather Service (NWS) San Diego reports that high temperatures will range from the mid-80s to lower 90s at beaches, and mid-90s to around 100 degrees for mesas and higher coastal terrain. Overnight lows will remain warm, in the upper 60s to mid-70s.

These conditions significantly increase the risk of heat-related illnesses. The NWS strongly advises residents to drink plenty of fluids, stay in air-conditioned rooms, and avoid prolonged sun exposure. It is also crucial to check on relatives and neighbors, especially those who may be vulnerable.

Important Safety Alert: Never leave young children or pets in unattended vehicles. Interior car temperatures can quickly become lethal.

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