San Bernardino County placed under an extreme heat warning from Wednesday to Sunday

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At 10:16 a.m. on Monday, the NWS Las Vegas NV released an extreme heat warning valid from Wednesday 11 a.m. until Sunday 8 p.m. The warning is for Death Valley, Western Mojave Desert, Eastern Mojave Desert, Including the Mojave National Preserve, Morongo Basin and Cadiz Basin.

"High temperatures in the Colorado River Valley and the lower elevations of Death Valley will top out in the 100 to 108 range. Temperatures in the lower elevations of San Bernardino County will top out in the 95 to 105 range with temperatures in the higher elevations topping out in the 90s," can be anticipated according to the NWS. "Extreme early-season heat coupled with high tourism rates will make this heat very dangerous, particularly for those not acclimated to the heat and/or traveling from cooler climates. Numerous daily and monthly heat records are in jeopardy through at least Sunday."

"Heat-related illnesses increase significantly during extreme heat events," says the NWS.

This warning is in effect until Mar. 22 at 8 p.m.

NWS Heat Wave Safety Advice: Protect yourself with these recommendations

• 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.
• Child and pet safety: Never leave young children and pets unattended in hot vehicles - car interiors can reach lethal temperatures in a matter of minutes.
• Take extra precautions outdoors: If you work or spend time outside, be sure to take additional safety measures.
• 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 minimize risks during outdoor work, the Occupational Safety and Health Administration (OSHA) advises incorporating frequent rest breaks in shaded or air-conditioned areas. If someone experiences heat-related symptoms, promptly relocate them to a cool and shaded spot. In case of an emergency, dial 911.

Source: The National Weather Service

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This story was originally published March 16, 2026 at 10:19 AM.