Heat advisory affecting Southern California until Friday evening

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On Wednesday at 7:57 a.m. the NWS Los Angeles/Oxnard CA issued a heat advisory in effect until Friday at 8 p.m. The advisory is for Cuyama Valley, Santa Clarita Valley, Southern Salinas Valley, San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Barbara County Interior Mountains, Western San Fernando Valley, Eastern San Fernando Valley, Santa Susana Mountains, Southern Ventura County Mountains, Northern Ventura County Mountains, Interstate 5 Corridor, Western San Gabriel Mountains and Highway 14 Corridor, Eastern San Gabriel Mountains and Los Angeles.

"Temperatures up to 105 degrees," can be expected according to the NWS. "The warmest temperatures with this event are expected to occur Wednesday and Thursday afternoons with only a very modest cool down Friday providing little relief. Temperatures are expected to cool down slightly more over the weekend, but remain above normal into the following week."

"There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors," explains the NWS.

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

Ways to stay safe in the heat according to the NWS

• Consume plenty of fluids to stay hydrated.
• Seek cool shelter: Opt for an air-conditioned room to stay comfortable.
• Avoid direct sun exposure: Protect yourself and check on vulnerable relatives and neighbors.
• Child and pet welfare: Never forget to safeguard young children and pets by not leaving them unattended in vehicles, especially during scorching weather when car interiors can become life-threateningly hot.
• Exercise caution outdoors: If you work or spend time outside, take additional safety measures.
• Find the right time: Consider rescheduling strenuous activities to early morning or evening if possible.
• Recognize warning signs: Know the signs and symptoms of heat exhaustion and heat stroke.
• Stay cool with clothing: Select lightweight and loose-fitting outfits for enhanced comfort.

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 8, 2026 at 7:58 AM.