284 WWUS76 KSGX 280856 NPWSGX URGENT - WEATHER MESSAGE National Weather Service San Diego CA 156 AM PDT Tue Jul 28 2026 CAZ048-282245- /O.NEW.KSGX.XH.W.0007.260730T1700Z-260803T0300Z/ San Bernardino and Riverside County Valleys-The Inland Empire- Including the cities of Moreno Valley, San Bernardino, Riverside, Fontana, Ontario, Corona, and Rancho Cucamonga 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with temperatures up to 110 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * 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. && $$ CAZ056-282245- /O.NEW.KSGX.XH.W.0007.260730T1700Z-260803T0300Z/ Riverside County Mountains- Including the cities of Idyllwild-Pine Cove 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with high temperatures in the mid 90s to 105 below 7000 feet expected. * WHERE...Riverside County Mountains. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ058-282245- /O.NEW.KSGX.XH.W.0007.260730T1700Z-260803T0300Z/ San Diego County Mountains- Including the cities of Julian and Pine Valley 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with high temperatures in the mid 90s to 105 expected. * WHERE...San Diego County Mountains. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * 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. && $$ CAZ060-282245- /O.NEW.KSGX.XH.W.0007.260730T1700Z-260803T0300Z/ Apple and Lucerne Valleys- Including the cities of Victorville, Hesperia, Apple Valley, and Lucerne Valley 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with high temperatures up to 114 expected. * WHERE...Apple and Lucerne Valleys. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ061-062-065-282245- /O.NEW.KSGX.XH.W.0007.260730T1700Z-260803T0300Z/ Coachella Valley-San Diego County Deserts-San Gorgonio Pass near Banning- Including the cities of Palm Desert Country, La Quinta, Cathedral City, Palm Springs, Borrego Springs, Indio, Palm Desert, and Coachella 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with high temperatures up to 122 expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * 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. && $$ CAZ050-282245- /O.NEW.KSGX.XH.W.0007.260731T1700Z-260803T0300Z/ San Diego County Valleys- Including the cities of Poway, Escondido, Santee, La Mesa, El Cajon, and San Marcos 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM FRIDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with high temperatures in the mid 90s in the western valleys to around 105 near the foothills expected. * WHERE...San Diego County Valleys. * WHEN...From 10 AM Friday to 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ057-282245- /O.NEW.KSGX.XH.W.0007.260731T1700Z-260803T0300Z/ Santa Ana Mountains and Foothills-156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM FRIDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with temperatures up to 103 expected. * WHERE...Santa Ana Mountains and Foothills. * WHEN...From 10 AM Friday to 8 PM PDT Sunday. * 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. && $$ CAZ554-282245- /O.NEW.KSGX.XH.W.0007.260731T1700Z-260803T0300Z/ Orange County Inland Areas- Including the cities of Santa Ana, Garden Grove, Orange, Mission Viejo, Fullerton, Anaheim, and Irvine 156 AM PDT Tue Jul 28 2026 ...EXTREME HEAT WARNING IN EFFECT FROM 10 AM FRIDAY TO 8 PM PDT SUNDAY... * WHAT...Dangerously hot conditions with high temperatures mid to upper 90s east of Interstate 5 expected. * WHERE...Orange County Inland Areas. * WHEN...From 10 AM Friday to 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ055-282245- /O.NEW.KSGX.HT.Y.0007.260730T1700Z-260803T0300Z/ San Bernardino County Mountains- Including the cities of Big Bear City, Lake Arrowhead, Big Bear Lake, Wrightwood, Crestline, and Running Springs 156 AM PDT Tue Jul 28 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT SUNDAY... * WHAT...High temperatures in the 90s to around 100 below 7000 feet expected. * WHERE...San Bernardino County Mountains. * WHEN...From 10 AM Thursday to 8 PM PDT Sunday. * 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. && $$ CAZ043-282245- /O.NEW.KSGX.HT.Y.0007.260731T1700Z-260803T0300Z/ San Diego County Coastal Areas- Including the cities of San Diego, National City, Oceanside, Encinitas, Chula Vista, Carlsbad, and Vista 156 AM PDT Tue Jul 28 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM FRIDAY TO 8 PM PDT SUNDAY... * WHAT...High temperatures in the mid 80s to around 90 for the mesas and other higher coastal terrain expected. * WHERE...San Diego County Coastal Areas. * WHEN...From 10 AM Friday to 8 PM PDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. && $$ CAZ552-282245- /O.NEW.KSGX.HT.Y.0007.260731T1700Z-260803T0300Z/ Orange County Coastal Areas- Including the cities of Costa Mesa and Huntington Beach 156 AM PDT Tue Jul 28 2026 ...HEAT ADVISORY IN EFFECT FROM 10 AM FRIDAY TO 8 PM PDT SUNDAY... * WHAT...High temperatures in the mid 80s to lower 90s for higher coastal terrain expected. * WHERE...Orange County Coastal Areas. * WHEN...From 10 AM Friday to 8 PM PDT Sunday. * 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