WWUS76 KSGX 041921

NPWSGX



URGENT - WEATHER MESSAGE

National Weather Service San Diego CA

1221 PM PDT Tue Aug 4 2026



CAZ060-050515-

/O.CON.KSGX.XH.W.0007.000000T0000Z-260809T0300Z/

Apple and Lucerne Valleys-

Including the cities of Lucerne Valley, Victorville, Hesperia,

and Apple Valley

1221 PM PDT Tue Aug 4 2026



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



* WHAT...Dangerously hot conditions with high temperatures of 100 to 

  110 expected.



* 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.



&&



$$



CAZ061-062-065-050515-

/O.CON.KSGX.XH.W.0007.000000T0000Z-260809T0300Z/

Coachella Valley-San Diego County Deserts-San Gorgonio Pass near

Banning-

Including the cities of Indio, Borrego Springs, Palm Desert, Palm

Desert Country, Cathedral City, Coachella, La Quinta, and Palm

Springs

1221 PM PDT Tue Aug 4 2026



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



* WHAT...Dangerously hot conditions with high temperatures of 110 to 

  115 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.



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.



&&



$$



CAZ048-050515-

/O.CON.KSGX.HT.Y.0008.000000T0000Z-260809T0300Z/

San Bernardino and Riverside County Valleys-The Inland Empire-

Including the cities of Riverside, Rancho Cucamonga, Corona,

Moreno Valley, San Bernardino, Fontana, and Ontario

1221 PM PDT Tue Aug 4 2026



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



* WHAT...High temperatures in the upper 90s to 105 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.



&&



$$



CAZ055-050515-

/O.CON.KSGX.HT.Y.0008.000000T0000Z-260809T0300Z/

San Bernardino County Mountains-

Including the cities of Big Bear Lake, Crestline, Big Bear City,

Wrightwood, Lake Arrowhead, and Running Springs

1221 PM PDT Tue Aug 4 2026



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



* WHAT...High temperatures mostly in the mid 80s to upper 90s below 

  6500 feet expected.



* WHERE...San Bernardino County Mountains.



* 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.



&&



$$



CAZ056-050515-

/O.CON.KSGX.HT.Y.0008.000000T0000Z-260809T0300Z/

Riverside County Mountains-

Including the cities of Idyllwild-Pine Cove

1221 PM PDT Tue Aug 4 2026



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



* WHAT...High temperatures mostly in the mid 80s to upper 90s below 

  6500 feet expected.



* WHERE...Riverside County Mountains.



* 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.



&&



$$



CAZ058-050515-

/O.CON.KSGX.HT.Y.0008.000000T0000Z-260809T0300Z/

San Diego County Mountains-

Including the cities of Pine Valley and Julian

1221 PM PDT Tue Aug 4 2026



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



* WHAT...High temperatures mostly in the mid 80s to upper 90s 

  expected.



* WHERE...San Diego County Mountains.



* 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.



&&



$$



CO