Weather Alerts For Joshua Tree, CA

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT /8 PM MST/ FRIDAY # DETAILS -------------------- WHAT Dangerously hot conditions with temperatures up to 115 to 118 degrees expected through Death Valley and the lower Colorado River Valley, with highs between 107 to 110 degrees elsewhere. WHERE Portions of northwest Arizona, southeast California, and southern Nevada. WHEN Until 8 PM PDT /8 PM MST/ Friday. IMPACTS Heat-related illnesses increase significantly during extreme heat events. ISSUED AT Thursday, August 20, 2026 at 4:57 AM PDT ISSUED BY National Weather Service Las Vegas NV HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose-fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates. # AREAS AFFECTED -------------------- AZ side, AZ side, NV side, NV side, Southern Clark County, Cadiz Basin, Death Valley National Park, Eastern Mojave Desert, Hualapai Mountains, Lake Havasu and Fort Mohave, Lake Mead , Lake Mead , Lake Mohave , Lake Mohave , Las Vegas Valley, Morongo Basin, Northeast Clark County, Northwest Deserts, San Bernardino County, Upper Colorado River Valley, Western Clark and Southern Nye County Including the cities of Topock, Golden Valley, Amargosa Valley, Mesquite, Lake Havasu City, Morongo Valley, Twentynine Palms, Stovepipe Wells, Vidal Junction, Cal-Nev-Ari, Primm, Laughlin, Mitchell Caverns, Overton, Baker, Mountain Pass, Desert Rock, North Las Vegas, Pahrump, Furnace Creek, Indian Springs, Henderson, Yucca, South Cove, Moapa, Boulder City, Temple Bar, Needles, Shoshone, Valentine, Hualapai Peak, Dolan Springs, Yucca Valley, Hoover Dam, Searchlight, Bullhead City, Kingman, Las Vegas, Wikieup, and Desert Hills