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Extreme Heat Warning for San Diego County Inland Valleys

An Extreme Heat Warning is in effect for San Diego County Inland Valleys from October 5 to October 8, with dangerously hot conditions and high risks of heat-related illnesses.

Staff Writer
10/05/2026 · Chula Vista edition

Residents in San Diego County Inland Valleys are urged to take immediate precautions as an Extreme Heat Warning has been issued by the National Weather Service San Diego CA. The warning is in effect from Monday, October 5, at 11:29 AM PDT until Thursday, October 8, at 8:00 PM PDT.

Dangerously hot conditions are expected, with high temperatures ranging from the mid-90s to 105 degrees Fahrenheit. Nights will offer little relief, with low temperatures remaining very warm, in the upper 60s to mid-70s.

The primary concern during this period is a significant increase in heat-related illnesses. The National Weather Service advises residents to drink plenty of fluids, stay in air-conditioned rooms, and stay out of direct sunlight. It is also crucial to check on relatives and neighbors, especially those who may be vulnerable to the heat.

Crucially, do not leave young children or pets in unattended vehicles. Interior car temperatures can become lethal in minutes. While the alert mentions strong winds, this specific heat warning does not include wind advisories. The focus remains on heat safety.

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