WWUS76 KSGX 222010 NPWSGX URGENT - WEATHER MESSAGE National Weather Service San Diego CA 110 PM PDT Sat Aug 22 2026 CAZ061-062-065-230500- /O.CON.KSGX.XH.W.0008.000000T0000Z-260829T0300Z/ Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning- Including the cities of Cathedral City, Indio, Palm Desert Country, Borrego Springs, La Quinta, Coachella, Palm Springs, and Palm Desert 110 PM PDT Sat Aug 22 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Dangerously hot conditions with temperatures up to 117. * 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. * ADDITIONAL DETAILS...Overnight temperatures 5 to 8 degrees above normal will limit relief from the heat. 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. && $$ CAZ048-050-056>058-554-230500- /O.NEW.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ /O.EXT.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Valleys-Riverside County Mountains-Santa Ana Mountains and Foothills-San Diego County Mountains-Orange County Inland Areas- Including the cities of El Cajon, Escondido, Anaheim, Mission Viejo, Pine Valley, Rancho Cucamonga, Irvine, Santa Ana, Garden Grove, San Marcos, Fontana, Idyllwild-Pine Cove, Poway, Julian, Orange, Santee, Moreno Valley, Ontario, Fullerton, Riverside, La Mesa, San Bernardino, and Corona 110 PM PDT Sat Aug 22 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Temperatures 90 to 97 for Inland Orange County, 90 to 102 for the San Diego County Valleys, 98 to 106 for the Inland Empire and 89 to 100 in the mountains. Temperatures increase another few degrees into the middle and end of next week, making for a prolonged and dangerous stretch of heat. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Increasing temperatures into the middle of next week will increase the threat of heat-related illness across populations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ055-230500- /O.NEW.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ /O.EXT.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ San Bernardino County Mountains- Including the cities of Running Springs, Big Bear City, Crestline, Big Bear Lake, Lake Arrowhead, and Wrightwood 110 PM PDT Sat Aug 22 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...For the Heat Advisory, temperatures up to 94. For the Extreme Heat Watch, dangerously hot conditions with temperatures up to 98 possible and moderate to major HeatRisk. * WHERE...San Bernardino County Mountains. * WHEN...For the Heat Advisory, until 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. && $$ CAZ043-552-230500- /O.NEW.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ San Diego County Coastal Areas-Orange County Coastal Areas- Including the cities of Chula Vista, Huntington Beach, National City, Newport Beach, Carlsbad, Costa Mesa, Encinitas, Vista, Laguna Beach, San Diego, Oceanside, and San Clemente 110 PM PDT Sat Aug 22 2026 ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Dangerously hot conditions with high temperatures reaching the upper 80s to low 90s with limited overnight cooling. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...The combination of hot daytime temperatures with overnight temperatures struggling to drop below the lower 70s will especially affect those without access to air conditioning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ060-230500- /O.NEW.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ Apple and Lucerne Valleys- Including the cities of Lucerne Valley, Apple Valley, Hesperia, and Victorville 110 PM PDT Sat Aug 22 2026 ...EXTREME HEAT WATCH IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Dangerously hot conditions with temperatures up to 108 possible and limited nighttime cooling. * WHERE...Apple and Lucerne Valleys. * 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. && $$ Westerink