Extreme heat warning in place for Southern California for Wednesday and Thursday

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On Monday at 10:37 a.m. the NWS San Diego CA issued an extreme heat warning valid from Wednesday 10 a.m. until Thursday 8 p.m. The warning is for San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Inland Valleys, San Bernardino County Mountains, Riverside County Mountains, Santa Ana Mountains and Foothills, San Diego County Mountains, San Gorgonio Pass Near Banning and Orange County Inland.

The NWS informs, "Hot and humid conditions with elevated overnight temperatures. Temperatures will be in the 90s for inland Orange County and in the mountains below 6000 feet, 90s to near 100 in the San Diego County valleys, and 100 to 110 for the Inland Empire."

"Heat related illnesses increase significantly during extreme heat events. Those spending long periods outdoors will be at greater risk for heat health impacts," comments the NWS.

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

NWS Heat Wave Safety Advice: Protect yourself with these recommendations

• 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.
• 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.
• Time your activities wisely: If possible, reschedule strenuous activities to early morning or evening when the heat is less intense.
• Be alert to warning signs: Educate yourself about the signs and symptoms of heat exhaustion and heat stroke.
• Dress for comfort: Wear lightweight and loose-fitting clothing to stay cool.

To reduce risk during outdoor work, the Occupational Safety and Health Administration (OSHA) recommends scheduling frequent rest breaks in shaded or air-conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. In an emergency, call 911.

Source: The National Weather Service

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This story was originally published July 13, 2026 at 10:43 AM.