154
WWUS76 KSGX 090958
NPWSGX
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE SAN DIEGO CA
258 AM PDT WED SEP 9 2026
CAZ043-552-092230-
/O.CON.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, SAN DIEGO, VISTA,
ENCINITAS, COSTA MESA, HUNTINGTON BEACH, CHULA VISTA, AND CARLSBAD
258 AM PDT WED SEP 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES IN THE MID 80S TO LOWER 90S AT THE BEACHES
TO AROUND 100 HIGHER COASTAL TERRAIN WITH LOW TEMPERATURES IN THE
LOWER TO MID 70S. FOR THE HEAT ADVISORY, HIGH TEMPERATURES IN THE
80S AND LOWER 90S.
* WHERE...ORANGE COUNTY COASTAL AREAS AND SAN DIEGO COUNTY COASTAL
AREAS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* ADDITIONAL DETAILS...MAJOR TO EXTREME HEATRISK THROUGH TODAY. 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.
CAZ048-092230-
/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 SAN BERNARDINO, CORONA, ONTARIO, FONTANA,
RIVERSIDE, MORENO VALLEY, AND RANCHO CUCAMONGA
258 AM PDT WED SEP 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES OF 104 TO 110 WITH LOW TEMPERATURES IN THE
70S AND LOWER 80S EXPECTED. FOR THE HEAT ADVISORY, HIGH
TEMPERATURES IN THE UPPER 90S TO 105 EXPECTED.
* WHERE...SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND
EMPIRE.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* ADDITIONAL DETAILS...MAJOR HEATRISK THROUGH TODAY. 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.
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
CAZ050-092230-
/O.CON.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0011.260910T0300Z-260911T0300Z/
SAN DIEGO COUNTY VALLEYS-
INCLUDING THE CITIES OF LA MESA, EL CAJON, SAN MARCOS, POWAY, SANTEE,
AND ESCONDIDO
258 AM PDT WED SEP 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES IN THE MID 90S TO 107 WITH LOW TEMPERATURES
IN THE 70S EXPECTED. FOR THE HEAT ADVISORY, HIGH TEMPERATURES IN
THE MID 90S TO 104 EXPECTED.
* WHERE...SAN DIEGO COUNTY VALLEYS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* ADDITIONAL DETAILS...MAJOR TO EXTREME 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.
CAZ057-092230-
/O.CON.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0012.260910T0300Z-260911T0300Z/
SANTA ANA MOUNTAINS AND FOOTHILLS-
258 AM PDT WED SEP 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES IN THE 90S TO NEAR 100 WITH LOW TEMPERATURES
IN THE 70S EXPECTED. FOR THE HEAT ADVISORY, HIGH TEMPERATURES IN
THE MID 80S TO MID 90S EXPECTED.
* WHERE...SANTA ANA MOUNTAINS AND FOOTHILLS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY.
* 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.
TAKE EXTRA PRECAUTIONS WHEN OUTSIDE. WEAR LIGHTWEIGHT AND LOOSE
FITTING CLOTHING. TRY TO LIMIT STRENUOUS ACTIVITIES TO EARLY MORNING
OR EVENING. TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND
HEAT STROKE.
CAZ554-092230-
/O.CON.KSGX.XH.W.0009.000000T0000Z-260910T0300Z/
/O.CON.KSGX.HT.Y.0012.260910T0300Z-260911T0300Z/
ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF MISSION VIEJO, GARDEN GROVE, ORANGE, ANAHEIM,
SANTA ANA, FULLERTON, AND IRVINE
258 AM PDT WED SEP 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS
EVENING...
...HEAT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 8 PM PDT
THURSDAY...
* WHAT...FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS
WITH HIGH TEMPERATURES OF 100 TO 106 WITH LOW TEMPERATURES IN THE
70S EXPECTED. FOR THE HEAT ADVISORY, HIGH TEMPERATURES IN THE 90S
EXPECTED.
* WHERE...ORANGE COUNTY INLAND AREAS.
* WHEN...FOR THE EXTREME HEAT WARNING, UNTIL 8 PM PDT THIS EVENING.
FOR THE HEAT ADVISORY, FROM 8 PM THIS EVENING TO 8 PM PDT THURSDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* 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.
CAZ061-062-065-092230-
/O.CON.KSGX.XH.W.0009.260909T1700Z-260912T0300Z/
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-SAN GORGONIO PASS NEAR
BANNING-
INCLUDING THE CITIES OF PALM SPRINGS, BANNING, INDIO, PALM DESERT,
PALM DESERT COUNTRY, DESERT HOT SPRINGS, COACHELLA, BORREGO SPRINGS,
LA QUINTA, AND CATHEDRAL CITY
258 AM PDT WED SEP 9 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
8 PM PDT FRIDAY...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HIGH TEMPERATURES OF 110 TO
114 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 THIS MORNING 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.
CAZ056-058-092230-
/O.CON.KSGX.HT.Y.0011.000000T0000Z-260911T0300Z/
RIVERSIDE COUNTY MOUNTAINS-SAN DIEGO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF PINE VALLEY AND JULIAN
258 AM PDT WED SEP 9 2026
..HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM PDT THURSDAY
* WHAT...HIGH TEMPERATURES IN THE 90S BELOW 5500 FEET EXPECTED.
* WHERE...RIVERSIDE COUNTY MOUNTAINS AND SAN DIEGO COUNTY MOUNTAINS
BELOW 5500 FEET.
* WHEN...UNTIL 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
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page