347
WWUS76 KSGX 220245
NPWSGX

URGENT - WEATHER MESSAGE
National Weather Service San Diego CA
745 PM PDT Thu Aug 21 2025

CAZ060-221330-
/O.CON.KSGX.XH.W.0003.000000T0000Z-250824T0300Z/
Apple and Lucerne Valleys-
Including the cities of Lucerne Valley, Hesperia, Victorville,
and Apple Valley
745 PM PDT Thu Aug 21 2025

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures up to 108.

* 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.

&&

$$

CAZ061-062-065-221330-
/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, Palm
Desert Country, Palm Desert, Coachella, Indio, Cathedral City,
and La Quinta
745 PM PDT Thu Aug 21 2025

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY...

* WHAT...Dangerously hot conditions with temperatures up to 116.

* 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.

&&

$$

CAZ048-221330-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250824T0300Z/
San Bernardino and Riverside County Valleys-The Inland Empire-
Including the cities of Moreno Valley, Corona, Fontana, Ontario,
Rancho Cucamonga, Riverside, and San Bernardino
745 PM PDT Thu Aug 21 2025

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT SATURDAY...

* WHAT...Temperatures up to 108 expected.

* 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. Do not leave young
children and pets in unattended vehicles. Car interiors will reach
lethal temperatures in a matter of minutes.

&&

$$

CAZ050-221330-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
San Diego County Valleys-
Including the cities of El Cajon, San Marcos, La Mesa, Poway,
Santee, and Escondido
745 PM PDT Thu Aug 21 2025

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Temperatures up to 102 for the inland valleys expected.

* 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. Do not leave young
children and pets in unattended vehicles. Car interiors will reach
lethal temperatures in a matter of minutes.

&&

$$

CAZ055-056-058-221330-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
San Bernardino County Mountains-Riverside County Mountains-San
Diego County Mountains-
Including the cities of Big Bear City, Crestline, Pine Valley,
Running Springs, Lake Arrowhead, Julian, Big Bear Lake,
Idyllwild-Pine Cove, and Wrightwood
745 PM PDT Thu Aug 21 2025

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Temperatures up to 102 for elevations below 5500 feet
  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.

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.

&&

$$

CAZ057-554-221330-
/O.CON.KSGX.HT.Y.0005.000000T0000Z-250823T0300Z/
Santa Ana Mountains and Foothills-Orange County Inland Areas-
Including the cities of Irvine, Fullerton, Orange, Anaheim, Santa
Ana, Garden Grove, and Mission Viejo
745 PM PDT Thu Aug 21 2025

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY...

* WHAT...Temperatures up to 98 expected.

* WHERE...Orange County Inland Areas and Santa Ana Mountains and
  Foothills.

* 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. Do not leave young
children and pets in unattended vehicles. Car interiors will reach
lethal temperatures in a matter of minutes.

&&

$$

CO