038
WWUS76 KSGX 081044
NPWSGX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
344 AM PDT TUE SEP 8 2026
CAZ043-552-082330-
/O.EXT.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0011.260910T0300Z-260911T0300Z/
SAN DIEGO COUNTY COASTAL AREAS-ORANGE COUNTY COASTAL AREAS-
INCLUDING THE CITIES OF OCEANSIDE, NATIONAL CITY, COSTA MESA, VISTA,
SAN DIEGO, CARLSBAD, ENCINITAS, HUNTINGTON BEACH, AND CHULA VISTA
344 AM PDT TUE SEP 8 2026
..EXTREME HEAT WARNING NOW IN EFFECT UNTIL 8 PM PDT WEDNESDAY
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES IN THE MID 80S AT THE BEACHES TO 90S FOR
HIGHER COASTAL TERRAIN WITH LOW TEMPERATURES IN THE LOWER TO MID
70S. FOR THE HEAT ADVISORY, HIGH TEMPERATURES AROUND 80 NEAR THE
COAST TO THE LOWER TO MID 90S FOR HIGHER COASTAL TERRAIN.
* WHERE...ORANGE COUNTY COASTAL AREAS AND SAN DIEGO COUNTY COASTAL
AREAS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT WEDNESDAY. FOR
THE HEAT ADVISORY, FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS. HOT TEMPERATURES MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...MAJOR TO EXTREME HEATRISK THROUGH WEDNESDAY.
WARM OVERNIGHT LOW TEMPERATURE WILL LIMIT RELIEF FROM THE HEAT.
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.
CAZ048-082330-
/O.CON.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0011.260910T0300Z-260911T0300Z/
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
INCLUDING THE CITIES OF MORENO VALLEY, RIVERSIDE, ONTARIO, FONTANA,
SAN BERNARDINO, CORONA, AND RANCHO CUCAMONGA
344 AM PDT TUE SEP 8 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH TEMPERATURES HIGH TEMPERATURES IN THE UPPER 90S TO 108 WITH
LOW TEMPERATURES IN THE 70S EXPECTED. FOR THE HEAT ADVISORY, HIGH
TEMPERATURES IN THE MID 90S TO 102 EXPECTED.
* WHERE...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND
EMPIRE.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT WEDNESDAY. FOR
THE HEAT ADVISORY, FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS. HOT TEMPERATURES MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...MAJOR HEATRISK THROUGH WEDNESDAY. WARM
OVERNIGHT TEMPERATURES WILL LIMIT OVERNIGHT RELIEF FROM THE HEAT.
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.
CAZ050-082330-
/O.CON.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0011.260910T0300Z-260911T0300Z/
SAN DIEGO COUNTY VALLEYS-
INCLUDING THE CITIES OF ESCONDIDO, POWAY, SAN MARCOS, LA MESA, EL
CAJON, AND SANTEE
344 AM PDT TUE SEP 8 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES IN THE MID 90S TO 105 WITH LOW TEMPERATURES
IN THE 70S EXPECTED. FOR THE HEAT ADVISORY, HIGH TEMPERATURES IN
THE 90S TO 102 EXPECTED.
* WHERE...SAN DIEGO COUNTY VALLEYS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT WEDNESDAY. FOR
THE HEAT ADVISORY, FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS. 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.
CAZ554-082330-
/O.CON.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0012.260910T0300Z-260911T0300Z/
ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF ANAHEIM, MISSION VIEJO, SANTA ANA, IRVINE,
FULLERTON, ORANGE, AND GARDEN GROVE
344 AM PDT TUE SEP 8 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT WEDNESDAY
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM WEDNESDAY TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES IN THE 90S WITH LOW TEMPERATURES IN THE 70S
EXPECTED. FOR THE HEAT ADVISORY, HIGH TEMPERATURES IN THE UPPER 80S
TO MID 90S EXPECTED.
* WHERE...ORANGE COUNTY INLAND AREAS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT WEDNESDAY. FOR
THE HEAT ADVISORY, FROM 8 PM WEDNESDAY TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.OVERNIGHT
* ADDITIONAL DETAILS...MAJOR HEATRISK. WARM OVERNIGHT TEMPERATURES
WILL LIMIT RELIEF FROM THE HEAT.
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.
CAZ061-062-065-082330-
/O.CON.KSGX.XH.W.0009.260909T1700Z-260912T0300Z/
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-SAN GORGONIO PASS NEAR
BANNING-
INCLUDING THE CITIES OF BANNING, LA QUINTA, PALM DESERT, PALM DESERT
COUNTRY, INDIO, BORREGO SPRINGS, CATHEDRAL CITY, COACHELLA, DESERT
HOT SPRINGS, AND PALM SPRINGS
344 AM PDT TUE SEP 8 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM WEDNESDAY TO 8
PM PDT FRIDAY...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HIGH TEMPERATURES OF 106 TO
110 EXPECTED WITH LOW TEMPERATURES IN THE 80S EXPECTED.
* WHERE...COACHELLA VALLEY, SAN DIEGO COUNTY DESERTS, AND SAN
GORGONIO PASS NEAR BANNING.
* WHEN...FROM 10 AM WEDNESDAY TO 8 PM PDT FRIDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* ADDITIONAL DETAILS...AREAS OF MAJOR HEATRISK. VERY WARM OVERNIGHT
TEMPERATURES WILL LIMIT RELIEF FROM THE HEAT.
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.
CAZ056-058-082330-
/O.CON.KSGX.HT.Y.0011.260908T1700Z-260911T0300Z/
RIVERSIDE COUNTY MOUNTAINS-SAN DIEGO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF PINE VALLEY AND JULIAN
344 AM PDT TUE SEP 8 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM
PDT THURSDAY...
* WHAT...HIGH TEMPERATURES IN THE 90S BELOW 5500 FEET EXPECTED.
* WHERE...RIVERSIDE COUNTY MOUNTAINS AND SAN DIEGO COUNTY MOUNTAINS.
* WHEN...FROM 10 AM THIS MORNING TO 8 PM PDT THURSDAY.
* IMPACTS...HOT TEMPERATURES MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...MODERATE HEATRISK. WARM OVERNIGHT TEMPERATURES
WILL LIMIT RELIEF FROM THE HEAT.
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.
17
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