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Extreme Heat Warning Issued for San Diego Inland Valleys

An Extreme Heat Warning is in effect for San Diego County Inland Valleys from October 5th to October 8th, with dangerously high temperatures expected; residents should drink fluids, stay in air-conditioned areas, and never leave children or pets in cars.

Staff Writer
10/05/2026 · Chula Vista edition

Residents in the San Diego County Inland Valleys should prepare for dangerously hot conditions, with an Extreme Heat Warning issued by the National Weather Service (NWS) San Diego. The warning is in effect from 3:19 AM PDT on October 5th until 8:00 PM PDT on October 8th.

High temperatures are expected to reach the mid-90s to 105 degrees Fahrenheit. Nights will offer little relief, with low temperatures remaining warm, ranging from the upper 60s to mid-70s. These conditions significantly increase the risk of heat-related illnesses.

To stay safe, the NWS advises residents to drink plenty of fluids, stay in air-conditioned rooms, and remain out of the sun. It is also crucial to check on relatives and neighbors, especially those who may be vulnerable to the heat.

Never leave young children or pets in unattended vehicles. Car interiors can reach lethal temperatures rapidly, posing a severe danger.

This Extreme Heat Warning affects the San Diego County Inland Valleys. The NWS emphasizes the importance of taking these precautions to prevent serious health impacts during this period of extreme heat.

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