UPDATE: Extreme heat warning in place for San Bernardino County until Sunday evening

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The NWS Las Vegas NV released an updated extreme heat warning at 7:47 p.m. on Saturday in effect until Sunday at 8 p.m. The warning is for Death Valley, Western Mojave Desert, Eastern Mojave Desert, Including the Mojave National Preserve, Morongo Basin, Cadiz Basin and San Bernardino County-Upper Colorado River Valley.

"Dangerously hot temperatures climbing to near-30 degrees above seasonal normals," can be expected 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 Sunday at 8 p.m.

NWS Heat Wave Safety Tips: Stay safe with these recommendations

• Stay hydrated: Drink plenty of fluids.
• Stay in an air-conditioned room.
• Look out for others: Stay out of the sun, and check up on 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.
• Take extra precautions outdoors: If you work or spend time outside, be sure to take additional safety measures.
• Time your activities wisely: When possible, reschedule strenuous activities to early morning or evening.
• Know the red flags: Understand the signs and symptoms of heat exhaustion and heat stroke.
• Dress appropriately: Wear lightweight, loose-fitting clothing to stay comfortable.

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 March 17, 2026 at 8:07 AM.