Extreme Heat Warning

Locations Affected

Las Vegas, NV ∙ Henderson, NV ∙ North Las Vegas, NV ∙ Lake Havasu City, AZ ∙ Frenchman Mountain, NV ∙ Valley Wells, CA ∙ Cadiz Lake, CA ∙ Desert Hills, AZ ∙ Mount Bangs, AZ ∙ Overton Arm, NV

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Las Vegas NV 216 AM PDT Sat Mar 21 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT / MST SUNDAY... * WHAT...Dangerously hot temperatures climbing to near-30 degrees above seasonal normals. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada. * WHEN...Until 8 PM PDT / MST Sunday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...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. 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.

---