038 WWUS76 KLOX 230706 NPWLOX URGENT - WEATHER MESSAGE National Weather Service Los Angeles/Oxnard CA 1206 AM PDT Sun Aug 23 2026 CAZ038-251700- /O.CON.KLOX.HT.Y.0014.260823T1700Z-260825T1700Z/ /O.CON.KLOX.XH.A.0005.260825T1700Z-260829T0300Z/ Cuyama Valley- Including the cities of New Cuyama 1206 AM PDT Sun Aug 23 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...For the Heat Advisory, temperatures up to 99 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 104 possible. * WHERE...Cuyama Valley. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. 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. && $$ CAZ087-349-350-354-355-362-366>368-251700- /O.CON.KLOX.HT.Y.0014.260823T1700Z-260825T1700Z/ /O.CON.KLOX.XH.A.0005.260825T1700Z-260829T0300Z/ Catalina and Santa Barbara Islands-Santa Barbara County Southwestern Coast-Santa Barbara County Southeastern Coast- Ventura County Beaches-Ventura County Inland Coast-Malibu Coast- Los Angeles County Beaches-Palos Verdes Hills-Los Angeles County Inland Coast including Downtown Los Angeles- Including the cities of Port Hueneme, East Ventura, Jalama Beach, Goleta, Oxnard, El Capitan State Beach, Compton, Rancho Palos Verdes, LAX, Norwalk, Ventura, Pacific Palisades, Long Beach, Hollywood, Montecito, Refugio State Beach, Santa Monica, Torrance, Camarillo, Carpinteria, Beverly Hills, Culver City, Santa Barbara, Point Mugu, Downey, Malibu, Redondo Beach, Gaviota, and Avalon 1206 AM PDT Sun Aug 23 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...For the Heat Advisory, temperatures up to 94 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 100 possible. * WHERE...Catalina and Santa Barbara Islands, Los Angeles County Beaches, Los Angeles County Inland Coast including Downtown Los Angeles, Malibu Coast, Palos Verdes Hills, Santa Barbara County Southeastern Coast, Santa Barbara County Southwestern Coast, Ventura County Beaches, and Ventura County Inland Coast. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ088-351>353-356>358-369>376-378>380-548-251700- /O.CON.KLOX.HT.Y.0014.260823T1700Z-260825T1700Z/ /O.CON.KLOX.XH.A.0005.260825T1700Z-260829T0300Z/ Santa Clarita Valley-Santa Ynez Mountains Western Range-Santa Ynez Mountains Eastern Range-Santa Barbara County Interior Mountains-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-Interstate 5 Corridor-Western San Gabriel Mountains and Highway 14 Corridor-Eastern San Gabriel Mountains-Los Angeles County San Gabriel Valley- Including the cities of Northridge, Warm Springs, San Rafael Mountain, Westlake Village, San Gabriel, Sunland, Santa Clarita, San Marcos Pass, Tejon Pass, Ojai, Topatopa Mountains, El Monte, Oak View, Meiners Oaks, Simi Valley, The Angeles Crest Highway, Santa Paula, Fillmore, Pasadena, Big Pine Mountain, Mount Baldy, Piru, Woodland Hills, Malibu Bowl, Chatsworth, Figueroa Mountain, Glendale, Pomona, Matilija, La Canada Flintridge, Malibu Lake, Van Nuys, Oat Mountain, Gorman, East Los Angeles, Montecito Hills, Newhall, Universal City, Rose Valley, Thousand Oaks, Newbury Park, Moorpark, Burbank, Pyramid Lake, Acton, Topanga, Mill Creek, Mount Wilson, Wrightwood, Lake Castaic, and Valencia 1206 AM PDT Sun Aug 23 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...For the Heat Advisory, temperatures up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 112 possible. * WHERE...A portion of southwest California. * WHEN...For the Heat Advisory, from 10 AM this morning to 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. 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. && $$ CAZ381>383-251700- /O.CON.KLOX.XH.A.0005.260825T1700Z-260829T0300Z/ Western Antelope Valley Foothills-Eastern Antelope Valley Foothills-Antelope Valley- Including the cities of Elizabeth Lake, Llano, Valyermo, Lake Los Angeles, Palmdale, Lancaster, Lake Palmdale, and Pearblossom 1206 AM PDT Sun Aug 23 2026 ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Dangerously hot conditions with temperatures up to 112 possible. * WHERE...Antelope Valley, Eastern Antelope Valley Foothills, and Western Antelope Valley Foothills. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ ASR  705 WWUS75 KPSR 230713 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 1213 AM MST Sun Aug 23 2026 AZZ530>533-535-536-CAZ562-565>567-569-570-232230- /O.CON.KPSR.XH.W.0008.000000T0000Z-260830T0300Z/ Parker Valley-Kofa-Yuma-Central La Paz-Southeast Yuma County-Gila River Valley-Imperial County Southwest-Imperial County Southeast- Imperial County West-Imperial Valley-Palo Verde Valley-Chuckwalla Valley- Including the cities of Mountain Spring, Harcuvar, Coolidge Springs, Plaster City, Midland, Alamorio, Vicksburg, Ripley, El Centro, Vicksburg Junction, Fortuna Foothills, Parker, Martinez Lake, Brenda, Winterhaven, Quartzsite, Salton City, Ehrenberg, Yuma, Brawley, Ocotillo, Winona, Palo Verde, Ligurta, Palm Canyon, Salome, Blythe, Calexico, and Coyote Wells 1213 AM MST Sun Aug 23 2026 /1213 AM PDT Sun Aug 23 2026/ ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST /8 PM PDT/ SATURDAY... * WHAT...Dangerously hot and humid conditions. Afternoon temperatures 106 to 118 expected. Major to Extreme Heat Risk. * WHERE...Portions of southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details. && $$ AZZ534-538-539-541-545-547-549-552>555-559-232230- /O.CON.KPSR.XH.W.0008.000000T0000Z-260830T0300Z/ Aguila Valley-Tonopah Desert-Gila Bend-Cave Creek/New River-New River Mesa-Rio Verde/Salt River-Fountain Hills/East Mesa-Superior- Northwest Pinal County-West Pinal County-Apache Junction/Gold Canyon-Sonoran Desert Natl Monument- Including the cities of Superior, Scottsdale, Florence, Sentinel, Coolidge, Apache Junction, Tonopah, Tortilla Flat, Fountain Hills, Aguila, Wickenburg, Arlington, Kaka, Gila Bend, Casa Grande, Hassayampa, Gladden, Cactus Forest, and Wintersburg 1213 AM MST Sun Aug 23 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 105 to 116 expected. Major to Extreme Heat Risk. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, New River Mesa, Rio Verde/Salt River, and Superior. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat PRECAUTIONARY/PREPAREDNESS ACTIONS... An Extreme Heat Warning means that a period of very hot temperatures, even by localstandards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details. && $$ AZZ537-540-542>544-546-548-550-551-232230- /O.CON.KPSR.XH.W.0008.000000T0000Z-260830T0300Z/ Northwest Valley-Buckeye/Avondale-Deer Valley-Central Phoenix- North Phoenix/Glendale-Scottsdale/Paradise Valley-East Valley- South Mountain/Ahwatukee-Southeast Valley/Queen Creek- Including the cities of Circle City, Avondale, Phoenix, Goodyear, Wittmann, Sun Lakes, Beardsley, Cashion, Liberty, Sun City West, Tempe, Chandler, Gilbert, Paradise Valley, Peoria, Queen Creek, Surprise, and Mesa 1213 AM MST Sun Aug 23 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 116 expected. Major to Extreme Heat Risk. * WHERE...The Phoenix metropolitan area. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat PRECAUTIONARY/PREPAREDNESS ACTIONS... An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details. && $$ AZZ560-232230- /O.CON.KPSR.XH.W.0008.000000T0000Z-260830T0300Z/ San Carlos- Including the cities of San Carlos and Peridot 1213 AM MST Sun Aug 23 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 104 to 113 expected. Major to Extreme Heat Risk. * WHERE...San Carlos. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details. && $$ CK  302 WWCA72 TJSJ 230727 NPWSJU URGENT - WEATHER MESSAGE National Weather Service San Juan PR 327 AM AST Sun Aug 23 2026 PRZ001>003-005-007-008-010>013-VIZ001-002-231530- /O.NEW.TJSJ.HT.Y.0042.260823T1400Z-260823T2000Z/ San Juan and Vicinity-Northeast-Southeast-North Central-Ponce and Vicinity-Northwest-Mayaguez and Vicinity-Southwest-Culebra- Vieques-St.Thomas...St. John...and Adjacent Islands-St Croix- Including the cities of Barceloneta, Rio Grande, Ponce, Toa Alta, Luquillo, Salinas, Yauco, Cruz Bay, Camuy, Charlotte Amalie, Arecibo, Guayanilla, Charlotte Amalie East, Patillas, Dorado, Anasco, Vega Alta, Moca, Aguada, Charlotte Amalie West, Bayamon, Frederiksted Southeast, Rincon, Canovanas, Santa Isabel, Frederiksted, Cabo Rojo, Arroyo, Quebradillas, Guayama, Vega Baja, Maunabo, Fajardo, San German, Aguadilla, Isabela, Naguabo, Humacao, San Juan, Yabucoa, Christiansted, Florida, Toa Baja, Juana Diaz, Guaynabo, Penuelas, Carolina, Vieques, Lajas, Trujillo Alto, Mayaguez, Loiza, Manati, Guanica, Catano, Culebra, Anna's Retreat, Grove Place, Hormigueros, Ceiba, and Hatillo 327 AM AST Sun Aug 23 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THIS MORNING TO 4 PM AST THIS AFTERNOON... * WHAT...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. expected. * WHERE...Portions of Puerto Rico and Virgin Islands. * WHEN...From 10 AM this morning to 4 PM AST this afternoon. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ LIS