Weather Alerts For Menifee, CA

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM SATURDAY TO 8 PM PDT MONDAY # DETAILS -------------------- WHAT Temperatures 90 to 97 for Inland Orange County, 90 to 102 for inland San Diego County, 98 to 106 for the Inland Empire and 89 to 99 in the mountains. WHERE Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. WHEN From 10 AM Saturday to 8 PM PDT Monday. IMPACTS Hot temperatures may cause heat illnesses. ISSUED AT Friday, August 21, 2026 at 12:58 PM PDT ISSUED BY National Weather Service San Diego CA 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. # AREAS AFFECTED -------------------- Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys, San Diego County Mountains, San Diego County Valleys, Santa Ana Mountains and Foothills, The Inland Empire Including the cities of Fullerton, Ontario, San Bernardino, Poway, Irvine, Santa Ana, Mission Viejo, Anaheim, Pine Valley, Orange, Corona, San Marcos, Rancho Cucamonga, Escondido, Riverside, Julian, Garden Grove, La Mesa, El Cajon, Santee, Idyllwild-Pine Cove, Moreno Valley, and Fontana