Weather Alerts For Boulder City, NV

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/ THIS MORNING TO 8 PM PDT /8 PM MST/ MONDAY # DETAILS -------------------- WHAT Dangerously hot conditions expected. Afternoon temperatures in the desert valleys will climb into the 108 to 114 degree range, and may exceed 115 along the Colorado River Valley and 120 in Death Valley. Overnight lows generally 80 to 95 degrees. WHERE Portions of northwest Arizona, southeast California, and southern Nevada including the Greater Mojave Desert region. WHEN From 10 AM PDT /10 AM MST/ this morning to 8 PM PDT /8 PM MST/ Monday. IMPACTS Heat related illnesses increase significantly during extreme heat events. ISSUED AT Thursday, July 23, 2026 at 2:47 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, 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, Western Mojave Desert Including the cities of Shoshone, Desert Hills, Valentine, Searchlight, Yucca Valley, Indian Springs, Barstow, Mountain Pass, Vidal Junction, South Cove, Desert Rock, Hoover Dam, Yucca, Kingman, Overton, Primm, Topock, Temple Bar, Mesquite, Morongo Valley, Moapa, Fort Irwin, Stovepipe Wells, Cal-Nev-Ari, Las Vegas, Bullhead City, Twentynine Palms, Needles, Laughlin, Pahrump, Henderson, Lake Havasu City, Boulder City, Daggett, Wikieup, Amargosa Valley, Baker, Mitchell Caverns, Furnace Creek, North Las Vegas, Dolan Springs, and Golden Valley