WWUS76 KSGX 240440 NPWSGX URGENT - WEATHER MESSAGE National Weather Service San Diego CA 940 PM PDT Sun Aug 23 2026 CAZ061-062-065-241315- /O.CON.KSGX.XH.W.0008.000000T0000Z-260829T0300Z/ Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning- Including the cities of Palm Springs, La Quinta, Palm Desert, Palm Desert Country, Coachella, Borrego Springs, Cathedral City, and Indio 940 PM PDT Sun Aug 23 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY... * WHAT...Dangerously hot conditions with temperatures of 110 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. && $$ CAZ048-050-056>058-554-241315- /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ /O.CON.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ San Bernardino and Riverside County Valleys-The Inland Empire-San Diego County Valleys-Riverside County Mountains-Santa Ana Mountains and Foothills-San Diego County Mountains-Orange County Inland Areas- Including the cities of El Cajon, La Mesa, Idyllwild-Pine Cove, Corona, Garden Grove, Julian, Rancho Cucamonga, San Bernardino, Riverside, Ontario, Mission Viejo, Anaheim, Fontana, Escondido, Irvine, Santa Ana, Fullerton, Poway, Santee, Orange, San Marcos, Moreno Valley, and Pine Valley 940 PM PDT Sun Aug 23 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Temperatures 90 to 100 for Inland Orange County, 90 to 102 for the San Diego County Valleys, 100 to 108 for the Inland Empire and 89 to 101 in the mountains. * WHERE...Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Increasing temperatures into the middle of next week will increase the threat of heat-related illness across populations. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ055-241315- /O.CON.KSGX.HT.Y.0010.000000T0000Z-260825T1700Z/ /O.CON.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ San Bernardino County Mountains- Including the cities of Big Bear City, Lake Arrowhead, Running Springs, Big Bear Lake, Crestline, and Wrightwood 940 PM PDT Sun Aug 23 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 AM PDT TUESDAY... ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Temperatures in the mid to upper 90s below 5000 ft MSL. * 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. && $$ CAZ043-552-241315- /O.CON.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ San Diego County Coastal Areas-Orange County Coastal Areas- Including the cities of Newport Beach, San Clemente, San Diego, Carlsbad, Chula Vista, Huntington Beach, Laguna Beach, Encinitas, National City, Costa Mesa, Oceanside, and Vista 940 PM PDT Sun Aug 23 2026 ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Temperatures of 85 to 92 possible. * WHERE...Orange County Coastal Areas and San Diego County Coastal Areas. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Overnight lows around 5 to 7 degrees above normal will limit relief from the heat, especially for those without adequate cooling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ060-241315- /O.CON.KSGX.XH.A.0006.260825T1700Z-260829T0300Z/ Apple and Lucerne Valleys- Including the cities of Hesperia, Victorville, Apple Valley, and Lucerne Valley 940 PM PDT Sun Aug 23 2026 ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH FRIDAY EVENING... * WHAT...Dangerously hot conditions with temperatures of 101 to 108 possible. * WHERE...Apple and Lucerne Valleys. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures 5 to 10 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. && $$ SS