154
WWUS76 KSGX 091003
NPWSGX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
303 AM PDT SUN AUG 9 2026
CAZ060-092115-
/O.CON.KSGX.XH.W.0007.000000T0000Z-260810T0300Z/
APPLE AND LUCERNE VALLEYS-
INCLUDING THE CITIES OF APPLE VALLEY, LUCERNE VALLEY,
VICTORVILLE, AND HESPERIA
303 AM PDT SUN AUG 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES OF 100 TO 107
EXPECTED.
* WHERE...APPLE AND LUCERNE VALLEYS.
* WHEN...UNTIL 8 PM PDT THIS 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.
CAZ061-062-065-092115-
/O.CON.KSGX.XH.W.0007.000000T0000Z-260810T0300Z/
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-SAN GORGONIO PASS NEAR
BANNING-
INCLUDING THE CITIES OF PALM DESERT, BORREGO SPRINGS, PALM DESERT
COUNTRY, COACHELLA, CATHEDRAL CITY, PALM SPRINGS, LA QUINTA, AND
INDIO
303 AM PDT SUN AUG 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HIGH TEMPERATURES OF MID
100S TO AROUND 112 EXPECTED.
* WHERE...COACHELLA VALLEY, SAN DIEGO COUNTY DESERTS, AND SAN
GORGONIO PASS NEAR BANNING.
* WHEN...UNTIL 8 PM PDT THIS 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.
CAZ048-092115-
/O.CON.KSGX.HT.Y.0008.000000T0000Z-260810T0300Z/
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
INCLUDING THE CITIES OF RIVERSIDE, MORENO VALLEY, SAN BERNARDINO,
FONTANA, ONTARIO, RANCHO CUCAMONGA, AND CORONA
303 AM PDT SUN AUG 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
* WHAT...HIGH TEMPERATURES IN THE MID 90S TO LOW 100S EXPECTED.
* WHERE...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND
EMPIRE.
* WHEN...UNTIL 8 PM PDT THIS EVENING.
* 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.
CAZ050-092115-
/O.CON.KSGX.HT.Y.0008.000000T0000Z-260810T0300Z/
SAN DIEGO COUNTY VALLEYS-
INCLUDING THE CITIES OF SAN MARCOS, ESCONDIDO, POWAY, LA MESA, EL
CAJON, AND SANTEE
303 AM PDT SUN AUG 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
* WHAT...HIGH TEMPERATURES IN THE LOW TO MID 90S.
* WHERE...SAN DIEGO COUNTY VALLEYS.
* WHEN...UNTIL 8 PM PDT THIS EVENING.
* 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.
CAZ055-092115-
/O.CON.KSGX.HT.Y.0008.000000T0000Z-260810T0300Z/
SAN BERNARDINO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF BIG BEAR CITY, RUNNING SPRINGS, LAKE
ARROWHEAD, CRESTLINE, WRIGHTWOOD, AND BIG BEAR LAKE
303 AM PDT SUN AUG 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
* WHAT...HIGH TEMPERATURES IN THE MID 80S TO MID 90S BELOW 6500 FEET
EXPECTED.
* WHERE...SAN BERNARDINO COUNTY MOUNTAINS.
* WHEN...UNTIL 8 PM PDT THIS EVENING.
* 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.
CAZ056-092115-
/O.CON.KSGX.HT.Y.0008.000000T0000Z-260810T0300Z/
RIVERSIDE COUNTY MOUNTAINS-
INCLUDING THE CITIES OF IDYLLWILD-PINE COVE
303 AM PDT SUN AUG 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
* WHAT...HIGH TEMPERATURES IN THE MID 80S TO UPPER 90S BELOW 6500
FEET EXPECTED.
* WHERE...RIVERSIDE COUNTY MOUNTAINS.
* WHEN...UNTIL 8 PM PDT THIS EVENING.
* 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.
CAZ057-554-092115-
/O.CON.KSGX.HT.Y.0008.000000T0000Z-260810T0300Z/
SANTA ANA MOUNTAINS AND FOOTHILLS-ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF GARDEN GROVE, IRVINE, ORANGE, SANTA ANA,
FULLERTON, MISSION VIEJO, AND ANAHEIM
303 AM PDT SUN AUG 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
* WHAT...HIGH TEMPERATURES IN THE LOW 90S EAST OF INTERSTATE 5. HIGH
TEMPERATURES IN THE MID-90S IN THE SANTA ANA MOUNTAINS.
* WHERE...ORANGE COUNTY INLAND AREAS AND SANTA ANA MOUNTAINS AND
FOOTHILLS.
* WHEN...UNTIL 8 PM PDT THIS EVENING.
* 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.
CAZ058-092115-
/O.CON.KSGX.HT.Y.0008.000000T0000Z-260810T0300Z/
SAN DIEGO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF JULIAN AND PINE VALLEY
303 AM PDT SUN AUG 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING
* WHAT...HIGH TEMPERATURES IN THE MID 80S TO UPPER 90S EXPECTED.
* WHERE...SAN DIEGO COUNTY MOUNTAINS.
* WHEN...UNTIL 8 PM PDT THIS EVENING.
* 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.
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