Heat advisory issued for San Diego County Mountains for Wednesday and Thursday

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A heat advisory was issued by the NWS San Diego CA on Tuesday at 12:13 a.m. valid from Wednesday 10 a.m. until Thursday 8 p.m. for San Diego County Mountains.

The NWS informs, "High temperatures in the 90s expected."

"Hot temperatures may cause heat illnesses," adds the NWS.

This advisory is in effect until Thursday at 8 p.m.

During heat waves, consider the following tips from the NWS

• Stay hydrated: Drink plenty of fluids.
• Seek shelter: Stay indoors in an air-conditioned room to keep cool.
• Avoid direct sun exposure: Protect yourself and check on vulnerable relatives and neighbors.
• Ensure child and pet safety: Do not leave young children and pets unattended in vehicles when car interiors can reach lethal temperatures in a matter of minutes.
• Be cautious outdoors: Take extra precautions if you work or spend time outside.
• Consider the timing: When possible reschedule strenuous activities to early morning or evening.
• Recognize early indicators: Learn to identify the warning signs of heat exhaustion and heat stroke.
• Dress comfortably: Wear lightweight and loose-fitting clothing.

For a safer outdoor work environment, follow the Occupational Safety and Health Administration (OSHA)'s guidance by scheduling regular rest breaks in shaded or air-conditioned places. If anyone shows signs of heat illness, promptly move them to a cool, shaded area. In an emergency, call 911.

Source: The National Weather Service

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This story was originally published July 7, 2026 at 12:17 AM.