Weather Alerts For Acton, CA

# HEADLINE -------------------- HEAT ADVISORY REMAINS IN EFFECT FROM 8 AM TUESDAY TO 9 PM PDT THURSDAY # DETAILS -------------------- WHAT Dangerously hot conditions with temperatures in the middle to upper 90s possible. Hottest Wednesday. WHERE Eastern San Fernando Valley, Eastern San Gabriel Mountains, Los Angeles County San Gabriel Valley, Santa Clarita Valley, Western San Fernando Valley, and Western San Gabriel Mountains and Highway 14 Corridor. WHEN From 8 AM Tuesday to 9 PM PDT Thursday. IMPACTS There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors. ADDITIONAL DETAILS Higher humidity will have the potential to add to the heat discomfort in the afternoons. Temperatures are expected to cool slightly after Thursday but will remain well above normal through the weekend. ISSUED AT Sunday, June 21, 2026 at 8:29 PM 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 -------------------- Eastern San Fernando Valley, Eastern San Gabriel Mountains, Los Angeles County San Gabriel Valley, Santa Clarita Valley, Western San Fernando Valley, Western San Gabriel Mountains and Highway 14 Corridor Including the cities of Mount Baldy, Glendale, Mill Creek, Wrightwood, East Los Angeles, Valencia, Universal City, Pasadena, Acton, El Monte, Sunland, Newhall, La Canada Flintridge, The Angeles Crest Highway, Santa Clarita, Pomona, Woodland Hills, Mount Wilson, Burbank, Lake Castaic, Van Nuys, Warm Springs, Northridge, Chatsworth, and San Gabriel