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Extreme Heat Warning for San Diego County Inland Valleys Until Thursday

An Extreme Heat Warning is in effect for San Diego County Inland Valleys until Thursday, October 8th, with dangerously high temperatures and warm nights expected, increasing the risk of heat-related illnesses.

Staff Writer
10/04/2026 · Chula Vista edition

Residents in the San Diego County Inland Valleys are urged to take immediate precautions as an Extreme Heat Warning has been issued. The National Weather Service (NWS) San Diego CA has forecast dangerously hot conditions from now until 8:00 PM PDT on Thursday, October 8th.

Expect high temperatures ranging from the upper 90s to 103 degrees Fahrenheit, accompanied by warm nights with lows in the lower to mid-70s. These conditions significantly increase the risk of heat-related illnesses.

To protect yourselves and your loved ones, the NWS advises drinking plenty of fluids, staying in air-conditioned rooms, and avoiding direct sun exposure. Check on relatives and neighbors, especially those who may be vulnerable to the heat.

A critical reminder: Never leave young children or pets in unattended vehicles. Interior car temperatures can become lethal in just minutes. While not explicitly part of the heat warning, the NWS also advises caution when driving high-profile vehicles due to potential strong winds, which can make driving difficult.

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