Heat Advisory
Status
Event Continued Active alertStart Time
Thu 08/20/2026 04:31 AM EDTEnd Time
Thu 08/20/2026 11:00 PM EDTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Glendale, CA ∙ Pomona, CA ∙ Santa Clarita, CA ∙ Pasadena, CA ∙ West Covina, CA ∙ El Monte, CA ∙ Whittier, CA ∙ Alhambra, CA ∙ Baldwin Park, CA ∙ Pico Rivera, CAFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 131 AM PDT Thu Aug 20 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING... * 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 this evening. * 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. 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.
Technical Header
CAZ038-088-343>345-351-353-371>373-375-376-379-380-548-210300- /O.CON.KLOX.HT.Y.0013.000000T0000Z-260821T0300Z/ Cuyama Valley-Santa Clarita Valley-Southern Salinas Valley-San Luis Obispo County Interior Valleys-San Luis Obispo County Mountains-Santa Ynez Mountains Western Range-Santa Barbara County Interior Mountains-Calabasas and Agoura Hills-Western San Fernando Valley-Eastern San Fernando Valley-Santa Susana Mountains-Southern Ventura County Mountains-Western San Gabriel Mountains and Highway 14 Corridor-Eastern San Gabriel Mountains- Los Angeles County San Gabriel Valley- Including the cities of Oat Mountain, Van Nuys, Shandon, Glendale, Creston, Figueroa Mountain, East Los Angeles, Northridge, Burbank, Wrightwood, Templeton, Acton, Mount Wilson, Valencia, Warm Springs, Santa Margarita Lake, Sunland, Malibu Lake, Big Pine Mountain, Pomona, San Miguel, Carrizo Plain, Woodland Hills, Matilija, Santa Clarita, Mount Baldy, Pasadena, Universal City, The Angeles Crest Highway, Lake Castaic, Topatopa Mountains, San Marcos Pass, San Gabriel, El Monte, Atascadero, Rose Valley, San Rafael Mountain, New Cuyama, Mill Creek, Caliente Range, Newhall, Chatsworth, Westlake Village, La Panza Range, Paso Robles, La Canada Flintridge, and Lake Nacimiento 131 AM PDT Thu Aug 20 2026
