Weather Alerts For Pomona, CA

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY # DETAILS -------------------- WHAT High temperatures of 92 to 105 expected, with most areas seeing peak heat on Wednesday and Thursday. Low temperatures are expected to range from the upper 60s to lower 70s at lower elevations to the mid 70s to lower 80s in the foothills and mountains. WHERE A portion of southwest California. WHEN Until 8 PM PDT Thursday. IMPACTS Hot temperatures may cause heat illnesses. Warmer than normal low temperatures will add to the heat discomfort. ADDITIONAL DETAILS The heat advisory may need to be extended into Friday for portions of the forecast area, but there remains considerable uncertainty at this time. ISSUED AT Wednesday, August 19, 2026 at 2:48 AM PDT ISSUED BY National Weather Service Los Angeles/Oxnard 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. 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. # AREAS AFFECTED -------------------- Los Angeles County San Gabriel Valley, Calabasas and Agoura Hills, Cuyama Valley, Eastern San Fernando Valley, Eastern San Gabriel Mountains, San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Barbara County Interior Mountains, Santa Clarita Valley, Santa Susana Mountains, Santa Ynez Mountains Western Range, Southern Salinas Valley, Southern Ventura County Mountains, Western San Fernando Valley, Western San Gabriel Mountains and Highway 14 Corridor Including the cities of Universal City, Mill Creek, Santa Clarita, San Miguel, Paso Robles, Caliente Range, Newhall, Big Pine Mountain, La Canada Flintridge, Warm Springs, Atascadero, Templeton, Woodland Hills, Wrightwood, Mount Wilson, East Los Angeles, El Monte, The Angeles Crest Highway, San Rafael Mountain, Chatsworth, Valencia, Sunland, Malibu Lake, Lake Castaic, Pomona, Oat Mountain, Rose Valley, La Panza Range, Lake Nacimiento, Pasadena, Westlake Village, Van Nuys, Figueroa Mountain, Matilija, Glendale, San Marcos Pass, Northridge, Topatopa Mountains, San Gabriel, Acton, Burbank, Carrizo Plain, New Cuyama, Santa Margarita Lake, Creston, Shandon, and Mount Baldy