Extreme heat warning affecting Southern California from Tuesday to Thursday

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The NWS Phoenix AZ issued an extreme heat warning at 11:30 a.m. on Sunday valid from Tuesday 10 a.m. until Thursday 8 p.m. The warning is for Imperial County Southwest, Chuckwalla Mountains, Imperial County Southeast, Imperial County West, Imperial Valley, Chiriaco Summit, Palo Verde Valley and Chuckwalla Valley.

The NWS informs, "Dangerously hot conditions possible. Afternoon temperatures of 109 to 117 degrees. Major Heat Risk."

"Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke," adds the NWS.

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

Protect yourself during a heat wave with these tips from the NWS

• Stay hydrated: Remember to drink plenty of fluids.
• Seek cool shelter: Opt for an air-conditioned room to stay comfortable.
• Stay out of the sun, and check up on relatives and neighbors.
• Prioritize child and pet safety: Be vigilant about never leaving young children and pets in vehicles without supervision, especially during periods of intense heat, as car interiors can quickly become extremely hot.
• Be mindful outdoors: Take extra precautions when working or spending time outside.
• Optimal Timing: When possible, reschedule strenuous activities to early morning or evening.
• Recognize warning signs: Know the signs and symptoms of heat exhaustion and heat stroke.
• Dress appropriately: Wear lightweight, loose-fitting clothing to stay comfortable.

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 5, 2026 at 11:33 AM.