Update: Heat advisory affecting Southern California Wednesday and Thursday

Published May 20, 2025

An updated heat advisory was released by the National Weather Service on Tuesday at 2:13 a.m. valid from Wednesday 11 a.m. until Thursday 9 p.m. The advisory is for Santa Clarita Valley, Southern Salinas Valley, Santa Ynez Valley, Santa Ynez Mountains Western Range, Santa Ynez Mountains Eastern Range, Santa Barbara County Interior Mountains, Lake Casitas, Ojai Valley, Central Ventura County Valleys, Los Angeles County Inland Coast including Downtown Los Angeles, Southeastern Ventura County Valleys, Santa Susana Mountains and Los Angeles County San Gabriel Valley.

The NWS states, “Temperatures up to 100 degrees expected.”

“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. Do not leave people or pets in closed vehicles,” says the NWS.

Beating the heat: Heat safety guidelines from the NWS

Stay hydrated: Make sure to drink plenty of fluids.

Seek cool shelter: Stay in an air-conditioned room.

Avoid sun exposure: Avoid direct sun exposure, protect yourself and check on vulnerable relatives and neighbors.

Child and pet safety: Never leave young children and pets unattended in vehicles, especially when car interiors can reach lethal temperatures within minutes.

Caution outdoors: Take extra precautions if you work or spend time outside.

Select the ideal time: Consider rescheduling strenuous activities to early morning or evening if possible.

Recognize heat-related issues: Recognize the warning signs and familiarize yourself with symptoms of heat exhaustion and heat stroke.

Dress for comfort: Wear lightweight, loose-fitting clothing to help your body stay cool.

Additional tips for outdoor workers:

• For outdoor workers, the Occupational Safety and Health Administration (OSHA) recommends regular rest breaks in shaded or air-conditioned areas.

• If someone succumbs to the heat, promptly relocate them to a cool, shaded location.

• In emergencies, call 911 for immediate assistance.

These NWS heat safety directives are essential for safeguarding your well-being when facing high temperatures. Stay well-informed and take the necessary precautions to shield yourself and others from the potential hazards of extreme heat.

Source: The National Weather Service

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