322
WWUS76 KSGX 202002
NPWSGX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
102 PM PDT WED AUG 20 2025
CAZ060-210530-
/O.CON.KSGX.XH.W.0003.000000T0000Z-250824T0300Z/
APPLE AND LUCERNE VALLEYS-
INCLUDING THE CITIES OF APPLE VALLEY, VICTORVILLE, HESPERIA, AND
LUCERNE VALLEY
102 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 108
EXPECTED.
* WHERE...APPLE AND LUCERNE VALLEYS.
* WHEN...UNTIL 8 PM PDT SATURDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* ADDITIONAL DETAILS...THURSDAY AND FRIDAY ARE EXPECTED TO BE THE
HOTTEST DAYS.
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.
CAZ061-062-065-210530-
/O.CON.KSGX.XH.W.0003.000000T0000Z-250824T0300Z/
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-SAN GORGONIO PASS NEAR
BANNING-
INCLUDING THE CITIES OF PALM DESERT COUNTRY, CATHEDRAL CITY,
BORREGO SPRINGS, PALM SPRINGS, COACHELLA, LA QUINTA, PALM DESERT,
AND INDIO
102 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 116
EXPECTED.
* 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.
* ADDITIONAL DETAILS...THURSDAY AND FRIDAY ARE EXPECTED TO BE THE
HOTTEST DAYS.
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.
CAZ048-210530-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250824T0300Z/
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
INCLUDING THE CITIES OF SAN BERNARDINO, RIVERSIDE, CORONA, MORENO
VALLEY, RANCHO CUCAMONGA, FONTANA, AND ONTARIO
102 PM PDT WED AUG 20 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY
* WHAT...TEMPERATURES UP TO 107 EXPECTED.
* WHERE...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND
EMPIRE.
* WHEN...UNTIL 8 PM PDT SATURDAY.
* IMPACTS...HOT TEMPERATURES MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...THURSDAY AND FRIDAY ARE EXPECTED TO BE THE
HOTTEST DAYS.
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.
CAZ050-210530-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
SAN DIEGO COUNTY VALLEYS-
INCLUDING THE CITIES OF LA MESA, POWAY, EL CAJON, SANTEE, SAN
MARCOS, AND ESCONDIDO
102 PM PDT WED AUG 20 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY
* WHAT...TEMPERATURES UP TO 103 FOR THE INLAND VALLEYS ARE EXPECTED.
* WHERE...SAN DIEGO COUNTY VALLEYS.
* WHEN...UNTIL 8 PM PDT FRIDAY.
* IMPACTS...HOT TEMPERATURES MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...THURSDAY AND FRIDAY ARE EXPECTED TO BE THE
HOTTEST DAYS.
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.
CAZ055-056-058-210530-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
SAN BERNARDINO COUNTY MOUNTAINS-RIVERSIDE COUNTY MOUNTAINS-SAN
DIEGO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF WRIGHTWOOD, LAKE ARROWHEAD, CRESTLINE,
JULIAN, RUNNING SPRINGS, IDYLLWILD-PINE COVE, PINE VALLEY, BIG
BEAR CITY, AND BIG BEAR LAKE
102 PM PDT WED AUG 20 2025
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY
* WHAT...TEMPERATURES IN THE 90S TO AROUND 100 BELOW 5500 FEET
ELEVATION EXPECTED.
* 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.
* ADDITIONAL DETAILS...THURSDAY AND FRIDAY ARE EXPECTED TO BE THE
HOTTEST DAYS.
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.
CAZ057-554-210530-
/O.CON.KSGX.HT.Y.0005.250821T1700Z-250823T0300Z/
SANTA ANA MOUNTAINS AND FOOTHILLS-ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF SANTA ANA, ORANGE, ANAHEIM, FULLERTON,
GARDEN GROVE, MISSION VIEJO, AND IRVINE
102 PM PDT WED AUG 20 2025
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM PDT
FRIDAY...
* WHAT...TEMPERATURES UP TO 97 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.
* ADDITIONAL DETAILS...THURSDAY AND FRIDAY ARE EXPECTED TO BE THE
HOTTEST DAYS.
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.
APR
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