Heat Advisory
Status
Event Continued Active alertStart Time
Tue 08/18/2026 01:00 PM EDTEnd Time
Thu 08/20/2026 11:00 PM EDTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Santa Clarita, CA ∙ Pasadena, CA ∙ Glendale, CA ∙ Pomona, CA ∙ El Monte, CA ∙ West Covina, CA ∙ Whittier, CA ∙ Alhambra, CA ∙ Baldwin Park, CA ∙ Montebello, CAFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 146 AM PDT Tue Aug 18 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM PDT THURSDAY... * 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...From 10 AM this morning to 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. 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>373-375-376-379-380-548-182100- /O.CON.KLOX.HT.Y.0013.260818T1700Z-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 Santa Clarita, Santa Margarita Lake, Northridge, Chatsworth, Warm Springs, Glendale, Oat Mountain, Caliente Range, Mount Wilson, Atascadero, New Cuyama, La Panza Range, Paso Robles, Pomona, Acton, La Canada Flintridge, Big Pine Mountain, Mill Creek, Templeton, San Gabriel, Figueroa Mountain, Burbank, Woodland Hills, Lake Nacimiento, San Rafael Mountain, Universal City, Pasadena, Matilija, The Angeles Crest Highway, Lake Castaic, Topatopa Mountains, El Monte, Newhall, Carrizo Plain, San Miguel, Wrightwood, San Marcos Pass, Valencia, East Los Angeles, Malibu Lake, Sunland, Westlake Village, Mount Baldy, Creston, Rose Valley, Shandon, and Van Nuys 146 AM PDT Tue Aug 18 2026
