098 WWUS76 KLOX 201926 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 1226 PM PDT Mon Jul 20 2026 CAZ088-356>358-369>382-548-212100- /O.NEW.KLOX.HT.Y.0010.260722T1700Z-260723T0300Z/ /O.NEW.KLOX.XH.A.0004.260723T0300Z-260728T0300Z/ Santa Clarita Valley-Lake Casitas-Ojai Valley-Central Ventura County Valleys-Western Santa Monica Mountains Recreational Area- Eastern Santa Monica Mountains Recreational Area-Calabasas and Agoura Hills-Western San Fernando Valley-Eastern San Fernando Valley-Southeastern Ventura County Valleys-Santa Susana Mountains- Southern Ventura County Mountains-Northern Ventura County Mountains-Interstate 5 Corridor-Western San Gabriel Mountains and Highway 14 Corridor-Eastern San Gabriel Mountains-Western Antelope Valley Foothills-Eastern Antelope Valley Foothills-Los Angeles County San Gabriel Valley- Including the cities of Oak View, Pasadena, Mount Baldy, Tejon Pass, Woodland Hills, Sunland, Simi Valley, Burbank, Westlake Village, Elizabeth Lake, Lake Palmdale, Mount Wilson, Llano, Ojai, Topanga, Universal City, Gorman, Newbury Park, Warm Springs, Malibu Lake, Oat Mountain, Rose Valley, Pyramid Lake, Santa Clarita, Valencia, La Canada Flintridge, East Los Angeles, Thousand Oaks, Chatsworth, Topatopa Mountains, Santa Paula, Wrightwood, Fillmore, Pomona, Valyermo, Meiners Oaks, Newhall, Malibu Bowl, The Angeles Crest Highway, Lake Castaic, Moorpark, San Gabriel, Northridge, Lockwood Valley, Van Nuys, Piru, Mount Pinos, Pearblossom, El Monte, Acton, Matilija, Ozena, Mill Creek, and Glendale 1226 PM PDT Mon Jul 20 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM TO 8 PM PDT WEDNESDAY... ...EXTREME HEAT WATCH IN EFFECT FROM WEDNESDAY EVENING THROUGH MONDAY EVENING... * WHAT...For the Heat Advisory, temperatures between 93 to 103 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures between 97 and 107 possible. * WHERE...A portion of southwest California. * WHEN...For the Heat Advisory, from 10 AM to 8 PM PDT Wednesday. For the Extreme Heat Watch, from Wednesday evening through Monday evening. * IMPACTS...There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors. 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. 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. && $$ CAZ038-348-351>353-212100- /O.NEW.KLOX.HT.Y.0010.260722T1700Z-260728T0300Z/ Cuyama Valley-Santa Ynez Valley-Santa Ynez Mountains Western Range-Santa Ynez Mountains Eastern Range-Santa Barbara County Interior Mountains- Including the cities of Los Olivos, San Rafael Mountain, Solvang, San Marcos Pass, Big Pine Mountain, Lake Cachuma, Figueroa Mountain, Montecito Hills, New Cuyama, and Santa Ynez 1226 PM PDT Mon Jul 20 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM PDT MONDAY... * WHAT...Temperatures up to 105 expected. * WHERE...Cuyama Valley, Santa Barbara County Interior Mountains, Santa Ynez Mountains Eastern Range, Santa Ynez Mountains Western Range, and Santa Ynez Valley. * WHEN...From 10 AM Wednesday to 8 PM PDT Monday. * IMPACTS...There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ349-350-212100- /O.NEW.KLOX.HT.Y.0010.260722T1700Z-260724T0300Z/ Santa Barbara County Southwestern Coast-Santa Barbara County Southeastern Coast- Including the cities of Refugio State Beach, Montecito, Goleta, Gaviota, Carpinteria, Jalama Beach, El Capitan State Beach, and Santa Barbara 1226 PM PDT Mon Jul 20 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM PDT THURSDAY... * WHAT...Temperatures up to 90 expected. * WHERE...Santa Barbara County Southeastern Coast and Santa Barbara County Southwestern Coast. * WHEN...From 10 AM Wednesday to 8 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. 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. && $$ CAZ368-212100- /O.NEW.KLOX.HT.Y.0010.260722T1700Z-260728T0300Z/ Los Angeles County Inland Coast including Downtown Los Angeles- Including the cities of Compton, Downey, Norwalk, Beverly Hills, Hollywood, and Culver City 1226 PM PDT Mon Jul 20 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM PDT MONDAY... * WHAT...Temperatures up to 92 expected. * WHERE...Los Angeles County Inland Coast including Downtown Los Angeles. * WHEN...From 10 AM Wednesday to 8 PM PDT Monday. * IMPACTS...There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ383-212100- /O.NEW.KLOX.XH.A.0004.260723T1700Z-260728T0300Z/ Antelope Valley- Including the cities of Palmdale, Lancaster, and Lake Los Angeles 1226 PM PDT Mon Jul 20 2026 ...EXTREME HEAT WATCH IN EFFECT FROM THURSDAY MORNING THROUGH MONDAY EVENING... * WHAT...Dangerously hot conditions with temperatures up to 108 possible. * WHERE...Antelope Valley. * WHEN...From Thursday morning through Monday evening. * IMPACTS...There is a high risk for dangerous heat illness for anyone, especially for the very young, the very old, those without air conditioning, and those active outdoors. 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. && $$ Visit us at http://www.weather.gov/LosAngeles MW