184
WWUS76 KSGX 210451
NPWSGX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
951 PM PDT WED AUG 20 2025
CAZ060-211300-
/O.CON.KSGX.XH.W.0003.000000T0000Z-250824T0300Z/
APPLE AND LUCERNE VALLEYS-
INCLUDING THE CITIES OF APPLE VALLEY, VICTORVILLE, HESPERIA, AND
LUCERNE VALLEY
951 PM PDT WED AUG 20 2025
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES UP TO 105.
* WHERE...APPLE AND LUCERNE VALLEYS.
* WHEN...UNTIL 8 PM PDT SATURDAY.
* 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.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
CAZ061-062-065-211300-
/O.CON.KSGX.XH.W.0003.000000T0000Z-250824T0300Z/
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-SAN GORGONIO PASS NEAR
BANNING-
INCLUDING THE CITIES OF PALM SPRINGS, BORREGO SPRINGS, COACHELLA,
LA QUINTA, PALM DESERT, CATHEDRAL CITY, PALM DESERT COUNTRY, AND
INDIO
951 PM PDT WED AUG 20 2025
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES UP TO 115.
* WHERE...COACHELLA VALLEY, SAN DIEGO COUNTY DESERTS, AND SAN
GORGONIO PASS NEAR BANNING.
* WHEN...UNTIL 8 PM PDT SATURDAY.
* 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.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
CAZ048-211300-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250824T0300Z/
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
INCLUDING THE CITIES OF FONTANA, ONTARIO, MORENO VALLEY, CORONA,
RIVERSIDE, RANCHO CUCAMONGA, AND SAN BERNARDINO
951 PM PDT WED AUG 20 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY
* WHAT...TEMPERATURES UP TO 105.
* WHERE...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND
EMPIRE.
* WHEN...UNTIL 8 PM PDT SATURDAY.
* 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.
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.
CAZ050-211300-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
SAN DIEGO COUNTY VALLEYS-
INCLUDING THE CITIES OF EL CAJON, LA MESA, ESCONDIDO, POWAY,
SANTEE, AND SAN MARCOS
951 PM PDT WED AUG 20 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY
* WHAT...TEMPERATURES UP TO 100.
* WHERE...SAN DIEGO COUNTY VALLEYS.
* 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.
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.
CAZ055-056-058-211300-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS-SAN
DIEGO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF RUNNING SPRINGS, CRESTLINE, WRIGHTWOOD,
BIG BEAR LAKE, LAKE ARROWHEAD, BIG BEAR CITY, JULIAN,
IDYLLWILD-PINE COVE, AND PINE VALLEY
951 PM PDT WED AUG 20 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY
* WHAT...TEMPERATURES UP TO 100.
* WHERE...RIVERSIDE COUNTY MOUNTAINS, SAN BERNARDINO COUNTY
MOUNTAINS, AND SAN DIEGO 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.
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.
CAZ057-554-211300-
/O.CON.KSGX.HT.Y.0005.250821T1700Z-250823T0300Z/
SANTA ANA MOUNTAINS AND FOOTHILLS-ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF GARDEN GROVE, SANTA ANA, FULLERTON,
IRVINE, MISSION VIEJO, ORANGE, AND ANAHEIM
951 PM PDT WED AUG 20 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT
FRIDAY...
* WHAT...TEMPERATURES UP TO 95 EXPECTED.
* WHERE...ORANGE COUNTY INLAND AREAS AND SANTA ANA MOUNTAINS AND
FOOTHILLS.
* WHEN...FROM 10 AM THURSDAY 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.
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.
PS
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