559 WWUS75 KPSR 240807 NPWPSR URGENT - WEATHER MESSAGE National Weather Service Phoenix AZ 107 AM MST Mon Aug 24 2026 AZZ530>533-535-536-CAZ562-565>567-569-570-242230- /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 Palm Canyon, Fortuna Foothills, Mountain Spring, Midland, Winterhaven, Quartzsite, Coyote Wells, Blythe, Salton City, Coolidge Springs, Vicksburg Junction, Ocotillo, Ligurta, Palo Verde, Brenda, Plaster City, Martinez Lake, Winona, Harcuvar, Ehrenberg, El Centro, Parker, Ripley, Alamorio, Salome, Brawley, Calexico, Vicksburg, and Yuma 107 AM MST Mon Aug 24 2026 /107 AM PDT Mon Aug 24 2026/ ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST /8 PM PDT/ SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 118. Extreme Heat Risk. * WHERE...Portions of southwest Arizona and southeast California. * WHEN...Until 8 PM MST /8 PM PDT/ Saturday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. 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>555-559-242230- /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 Hassayampa, Fountain Hills, Coolidge, Wickenburg, Florence, Sentinel, Casa Grande, Cactus Forest, Scottsdale, Aguila, Tonopah, Gladden, Tortilla Flat, Wintersburg, Gila Bend, Kaka, Apache Junction, Superior, and Arlington 107 AM MST Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 118. Extreme Heat Risk. * WHERE...A portion of south central Arizona. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * 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. Toreduce 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>544-546-548-550-551-242230- /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 Surprise, Gilbert, Cashion, Wittmann, Avondale, Tempe, Chandler, Queen Creek, Phoenix, Sun City West, Liberty, Sun Lakes, Mesa, Circle City, Beardsley, Peoria, Goodyear, and Paradise Valley 107 AM MST Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 108 to 116. Extreme Heat Risk. * WHERE...The Phoenix metropolitan area. * WHEN...Until 8 PM MST Saturday. * IMPACTS...Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. * 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. && $$ AZZ560-242230- /O.CON.KPSR.XH.W.0008.000000T0000Z-260830T0300Z/ San Carlos- Including the cities of San Carlos and Peridot 107 AM MST Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY... * WHAT...Dangerously hot conditions. Afternoon temperatures 103 to 112. Extreme Heat Risk. * WHERE...San Carlos. * WHEN...Until 8 PM MST Saturday. * IMPACTS... Increase in heat related illnesses, including heat cramps, heat exhaustion, and heat stroke. Heat stroke can lead to death. PRECAUTIONARY/PREPAREDNESS ACTIONS... An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details. && $$ CK  772 WWUS75 KGGW 240810 NPWGGW URGENT - WEATHER MESSAGE National Weather Service Glasgow MT 210 AM MDT Mon Aug 24 2026 MTZ016-017-021>023-250300- /O.CON.KGGW.LW.Y.0040.260824T1600Z-260825T0300Z/ Central and Southeast Phillips-Central and Southern Valley- Petroleum-Garfield-McCone- Including Fort Peck and Devils Creek Rec Area 210 AM MDT Mon Aug 24 2026 ...LAKE WIND ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 9 PM MDT THIS EVENING... * WHAT...Northwest winds 10 to 25 mph with gusts up to 35 mph expected. * WHERE...Fort Peck Lake. * WHEN...From 10 AM this morning to 9 PM MDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Waves of 2 to 4 feet expected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Boaters on Fort Peck Lake should use extra caution since strong winds and rough waves can overturn small craft. && $$ Ebert  867 WWUS76 KSGX 240810 NPWSGX URGENT - WEATHER MESSAGE National Weather Service San Diego CA 110 AM PDT Mon Aug 24 2026 CAZ048-050-056>058-554-240915- /O.CAN.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ /O.CAN.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Valleys-Riverside County Mountains-Santa Ana Mountains and Foothills-San Diego County Mountains-Orange County Inland Areas- Including the cities of Fullerton, Fontana, Poway, Santee, Ontario, Orange, Anaheim, Julian, Rancho Cucamonga, La Mesa, Idyllwild-Pine Cove, Moreno Valley, El Cajon, San Bernardino, Santa Ana, Corona, San Marcos, Irvine, Garden Grove, Pine Valley, Riverside, Mission Viejo, and Escondido 110 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IS CANCELLED... ...EXTREME HEAT WATCH IS CANCELLED... $$ CAZ055-241615- /O.CAN.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Bernardino County Mountains- Including the cities of Running Springs, Big Bear Lake, Lake Arrowhead, Crestline, Big Bear City, and Wrightwood 110 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH IS CANCELLED... * WHAT...Temperatures up to 94. * WHERE...San Bernardino County Mountains. * WHEN...Until 10 AM PDT Tuesday. * IMPACTS...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. && $$ CAZ043-060-552-240915- /O.CAN.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ San Diego County Coastal Areas-Apple and Lucerne Valleys-Orange County Coastal Areas- Including the cities of Newport Beach, Encinitas, Chula Vista, Carlsbad, Huntington Beach, Hesperia, San Clemente, Apple Valley, National City, Oceanside, Victorville, Lucerne Valley, Laguna Beach, Costa Mesa, Vista, and San Diego 110 AM PDT Mon Aug 24 2026 ...EXTREME HEAT WATCH IS CANCELLED... $$ CAZ061-062-065-241615- /O.CON.KSGX.XH.W.0008.000000T0000Z-260829T0300Z/ Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning- Including the cities of Indio, Palm Desert, Coachella, Palm Desert Country, Cathedral City, Borrego Springs, La Quinta, and Palm Springs 110 AM PDT Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Dangerously hot conditions with temperatures up to 113. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Friday. * 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. && $$ 17  382 WWUS76 KHNX 240836 NPWHNX URGENT - WEATHER MESSAGE National Weather Service Hanford CA 136 AM PDT Mon Aug 24 2026 CAZ337>339-242200- /O.CON.KHNX.XH.W.0003.260824T1200Z-260827T0600Z/ Indian Wells Valley-Mojave Desert Slopes-Mojave Desert- Including the cities of Mojave, Edwards AFB, Randsburg, California City, Inyokern, Rosamond, and Ridgecrest 136 AM PDT Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 5 AM EARLY THIS MORNING TO 11 PM PDT WEDNESDAY... * WHAT...Dangerously hot conditions with high temperatures up to 108 degrees expected. Morning low temperatures between 75 and 80 degrees will provide little relief at night. * WHERE...Indian Wells Valley, Mojave Desert, and Mojave Desert Slopes. * WHEN...From 5 AM early this morning to 11 PM PDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed. Monitor the latest forecasts and warnings for updates. && $$ CAZ304>316-242200- /O.CON.KHNX.HT.Y.0005.260824T1200Z-260827T0600Z/ Coalinga - Avenal-West Side of Fresno and Kings Counties- Caruthers - San Joaquin - Selma-Fresno-Clovis-West Side Mountains South of 198-Buttonwillow - Lost Hills - I5-Delano-Wasco-Shafter- Hanford - Corcoran - Lemoore-Visalia - Porterville - Reedley- Buena Vista-Bakersfield-Southeast San Joaquin Valley-South End San Joaquin Valley- Including the cities of Shafter, Delano, Kingsburg, Arvin, Buttonwillow, Hanford, Corcoran, Porterville, Parlier, McKittrick, Bakersfield, Selma, Lemoore Station, Alpaugh, Visalia, Goshen, Kerman, Blackwells Corner, Richgrove, Five Points, Lost Hills, Coalinga, Tulare, Avenal, Kettleman City, Fresno, Wasco, Lamont, Lemoore, Taft, and Sanger 136 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 5 AM EARLY THIS MORNING TO 11 PM PDT WEDNESDAY... * WHAT...High temperatures up to 104 degrees expected. * WHERE...Southern San Joaquin Valley and West Side Hills of the Coastal Range. * WHEN...From 5 AM early this morning to 11 PM PDT Wednesday. * IMPACTS...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. 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. && $$ BSO  127 WWUS76 KSGX 240854 NPWSGX URGENT - WEATHER MESSAGE National Weather Service San Diego CA 154 AM PDT Mon Aug 24 2026 CAZ048-242230- /O.EXB.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.EXA.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Including the cities of Rancho Cucamonga, Moreno Valley, San Bernardino, Corona, Fontana, Riverside, and Ontario 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, temperatures up to 106. For the Extreme Heat Warning, dangerously hot conditions with temperatures up to 110 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ050-242230- /O.EXB.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.EXA.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Diego County Valleys- Including the cities of San Marcos, La Mesa, El Cajon, Santee, Poway, and Escondido 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s in the western valleys to around 105 in the far inland valleys. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in he upper 90s to 109 expected. * WHERE...San Diego County Valleys. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * 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. && $$ CAZ057-242230- /O.EXB.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.EXA.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ Santa Ana Mountains and Foothills- 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 105 expected. * WHERE...Santa Ana Mountains and Foothills. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ058-242230- /O.EXB.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.EXA.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 104 expected. * WHERE...San Diego County Mountains. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * 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. && $$ CAZ554-242230- /O.EXB.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.EXA.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ Orange County Inland Areas- Including the cities of Orange, Irvine, Anaheim, Santa Ana, Fullerton, Garden Grove, and Mission Viejo 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 104 expected. * WHERE...Orange County Inland Areas. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ061-062-065-242230- /O.CON.KSGX.XH.W.0008.000000T0000Z-260829T0300Z/ Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning- Including the cities of Indio, Palm Desert, Coachella, Palm Desert Country, Cathedral City, Borrego Springs, La Quinta, and Palm Springs 154 AM PDT Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Dangerously hot conditions with high temperatures of 110 to 116 expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Friday. * 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. && $$ CAZ056-242230- /O.EXB.KSGX.HT.Y.0010.000000T0000Z-260829T0300Z/ Riverside County Mountains- Including the cities of Idyllwild-Pine Cove 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...High temperatures in the 90s to 102 expected. * WHERE...Riverside County Mountains. * WHEN...Until 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ043-242230- /O.EXB.KSGX.HT.Y.0010.260825T1700Z-260829T0300Z/ San Diego County Coastal Areas- Including the cities of Encinitas, Chula Vista, Carlsbad, National City, Oceanside, Vista, and San Diego 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...High temperatures in the mid 80s near the beaches to the lower to mid 90s for the mesas and other higher coastal terrain expected. * WHERE...San Diego County Coastal Areas. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...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. && $$ CAZ552-242230- /O.EXB.KSGX.HT.Y.0010.260825T1700Z-260829T0300Z/ Orange County Coastal Areas- Including the cities of Costa Mesa and Huntington Beach 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...High temperatures in the mid 80s near the beaches to the lower to mid 90s for higher coastal terrain expected. * WHERE...Orange County Coastal Areas. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ055-242230- /O.EXT.KSGX.HT.Y.0010.000000T0000Z-260829T0300Z/ San Bernardino County Mountains- Including the cities of Crestline and Lake Arrowhead 154 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Temperatures up to 96. * WHERE...San Bernardino County Mountains. * WHEN...Until 8 PM PDT Friday. * IMPACTS...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. && $$ 17  300 WWUS76 KSGX 240858 NPWSGX URGENT - WEATHER MESSAGE National Weather Service San Diego CA 158 AM PDT Mon Aug 24 2026 CAZ060-242230- /O.EXA.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ Apple and Lucerne Valleys- Including the cities of Apple Valley, Hesperia, Lucerne Valley, and Victorville 158 AM PDT Mon Aug 24 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...Dangerously hot conditions with high temperatures in the upper 90s to 108 expected. * WHERE...Apple and Lucerne Valleys. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ048-242230- /O.CON.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Including the cities of Rancho Cucamonga, Moreno Valley, San Bernardino, Corona, Fontana, Riverside, and Ontario 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, temperatures up to 106. For the Extreme Heat Warning, dangerously hot conditions with temperatures up to 110 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * 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. && $$ CAZ050-242230- /O.CON.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Diego County Valleys- Including the cities of San Marcos, La Mesa, El Cajon, Santee, Poway, and Escondido 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s in the western valleys to around 105 in the far inland valleys. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in he upper 90s to 109 expected. * WHERE...San Diego County Valleys. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ057-242230- /O.CON.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ Santa Ana Mountains and Foothills- 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 105 expected. * WHERE...Santa Ana Mountains and Foothills. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * 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. && $$ CAZ058-242230- /O.CON.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 104 expected. * WHERE...San Diego County Mountains. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ554-242230- /O.CON.KSGX.XH.W.0008.260825T1700Z-260829T0300Z/ /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ Orange County Inland Areas- Including the cities of Orange, Irvine, Anaheim, Santa Ana, Fullerton, Garden Grove, and Mission Viejo 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...For the Heat Advisory, high temperatures in the 90s expected. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in the mid 90s to 104 expected. * WHERE...Orange County Inland Areas. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * 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. && $$ CAZ061-062-065-242230- /O.CON.KSGX.XH.W.0008.000000T0000Z-260829T0300Z/ Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning- Including the cities of Indio, Palm Desert, Coachella, Palm Desert Country, Cathedral City, Borrego Springs, La Quinta, and Palm Springs 158 AM PDT Mon Aug 24 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Dangerously hot conditions with high temperatures of 110 to 116 expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ055-242230- /O.CON.KSGX.HT.Y.0010.000000T0000Z-260829T0300Z/ San Bernardino County Mountains- Including the cities of Crestline and Lake Arrowhead 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Temperatures in the mid to upper 90s below 5000 ft MSL. * WHERE...San Bernardino County Mountains. * WHEN...Until 8 PM PDT Friday. * IMPACTS...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. && $$ CAZ056-242230- /O.CON.KSGX.HT.Y.0010.000000T0000Z-260829T0300Z/ Riverside County Mountains- Including the cities of Idyllwild-Pine Cove 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...High temperatures in the 90s to 102 expected. * WHERE...Riverside County Mountains. * WHEN...Until 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ043-242230- /O.CON.KSGX.HT.Y.0010.260825T1700Z-260829T0300Z/ San Diego County Coastal Areas- Including the cities of Encinitas, Chula Vista, Carlsbad, National City, Oceanside, Vista, and San Diego 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...High temperatures in the mid 80s near the beaches to the lower to mid 90s for the mesas and other higher coastal terrain expected. * WHERE...San Diego County Coastal Areas. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...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. && $$ CAZ552-242230- /O.CON.KSGX.HT.Y.0010.260825T1700Z-260829T0300Z/ Orange County Coastal Areas- Including the cities of Costa Mesa and Huntington Beach 158 AM PDT Mon Aug 24 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT FRIDAY... * WHAT...High temperatures in the mid 80s near the beaches to the lower to mid 90s for higher coastal terrain expected. * WHERE...Orange County Coastal Areas. * WHEN...From 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ 17