257
WWUS75 KPSR 110317
NPWPSR
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PHOENIX AZ
817 PM MST THU SEP 10 2026
AZZ531-535>544-546-548>551-559-110430-
/O.EXP.KPSR.XH.W.0009.000000T0000Z-260911T0300Z/
KOFA-SOUTHEAST YUMA COUNTY-GILA RIVER VALLEY-NORTHWEST VALLEY-
TONOPAH DESERT-GILA BEND-BUCKEYE/AVONDALE-CAVE CREEK/NEW RIVER-
DEER VALLEY-CENTRAL PHOENIX-NORTH PHOENIX/GLENDALE-
SCOTTSDALE/PARADISE VALLEY-EAST VALLEY-FOUNTAIN HILLS/EAST MESA-
SOUTH MOUNTAIN/AHWATUKEE-SOUTHEAST VALLEY/QUEEN CREEK-SONORAN
DESERT NATL MONUMENT-
INCLUDING THE CITIES OF CASHION, CIRCLE CITY, KAKA, SUN LAKES,
GOODYEAR, PEORIA, GILBERT, HASSAYAMPA, SENTINEL, LIBERTY, SUN CITY
WEST, PARADISE VALLEY, QUEEN CREEK, TEMPE, LIGURTA, ARLINGTON,
SURPRISE, SCOTTSDALE, WITTMANN, FOUNTAIN HILLS, MESA, CHANDLER, PALM
CANYON, GILA BEND, BEARDSLEY, AVONDALE, WINTERSBURG, PHOENIX, AND
TONOPAH
817 PM MST THU SEP 10 2026
..EXTREME HEAT WARNING HAS EXPIRED
THE THREAT HAS ENDED.
AZZ530-533-CAZ569-570-111530-
/O.CON.KPSR.XH.W.0009.000000T0000Z-260912T0300Z/
PARKER VALLEY-CENTRAL LA PAZ-PALO VERDE VALLEY-CHUCKWALLA VALLEY-
INCLUDING THE CITIES OF MIDLAND, QUARTZSITE, VICKSBURG, VICKSBURG
JUNCTION, PALO VERDE, BLYTHE, EHRENBERG, HARCUVAR, PARKER, RIPLEY,
SALOME, MARTINEZ LAKE, AND BRENDA
817 PM MST THU SEP 10 2026 /817 PM PDT THU SEP 10 2026/
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST /8 PM PDT/
FRIDAY...
* WHAT...DANGEROUSLY HOT AND HUMID CONDITIONS. AFTERNOON TEMPERATURES
102 TO 110 EXPECTED. MAJOR HEAT RISK.
* WHERE...IN ARIZONA, CENTRAL LA PAZ AND PARKER VALLEY. IN
CALIFORNIA, CHUCKWALLA VALLEY AND PALO VERDE VALLEY. ALSO THE LOWER
COLORADO RIVER VALLEY.
* WHEN...UNTIL 8 PM MST /8 PM PDT/ FRIDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS. OVEREXPOSURE CAN CAUSE HEAT CRAMPS AND HEAT
EXHAUSTION TO DEVELOP AND, WITHOUT INTERVENTION, CAN LEAD TO HEAT
STROKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN EXTREME HEAT WARNING MEANS THAT A PERIOD OF VERY HOT TEMPERATURES,
EVEN BY LOCAL STANDARDS, WILL OCCUR. ACTIONS SHOULD BE TAKEN TO
LESSEN THE IMPACT OF THE EXTREME HEAT.
TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHTWEIGHT AND LOOSE-FITTING CLOTHING WHEN POSSIBLE AND
DRINK PLENTY OF WATER.
TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN
SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
PUBLIC COOLING SHELTERS ARE AVAILABLE IN SOME AREAS. CONSULT COUNTY
OFFICIALS FOR MORE DETAILS.
AZZ532-111530-
/O.CON.KPSR.XH.W.0009.000000T0000Z-260912T0300Z/
YUMA-
INCLUDING THE CITIES OF FORTUNA FOOTHILLS AND YUMA
817 PM MST THU SEP 10 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST FRIDAY
* WHAT...DANGEROUSLY HOT AND HUMID CONDITIONS. AFTERNOON TEMPERATURES
105 TO 109 EXPECTED. MAJOR HEAT RISK.
* WHERE...THE YUMA AREA.
* WHEN...UNTIL 8 PM MST FRIDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS. OVEREXPOSURE CAN CAUSE HEAT CRAMPS AND HEAT
EXHAUSTION TO DEVELOP AND, WITHOUT INTERVENTION, CAN LEAD TO HEAT
STROKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN EXTREME HEAT WARNING MEANS THAT A PERIOD OF VERY HOT TEMPERATURES,
EVEN BY LOCAL STANDARDS, WILL OCCUR. ACTIONS SHOULD BE TAKEN TO
LESSEN THE IMPACT OF THE EXTREME HEAT.
TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHTWEIGHT AND LOOSE-FITTING CLOTHING WHEN POSSIBLE AND
DRINK PLENTY OF WATER.
TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN
SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
PUBLIC COOLING SHELTERS ARE AVAILABLE IN SOME AREAS. CONSULT COUNTY
OFFICIALS FOR MORE DETAILS.
CAZ562-566-567-111530-
/O.CON.KPSR.XH.W.0009.000000T0000Z-260912T0300Z/
IMPERIAL COUNTY SOUTHWEST-IMPERIAL COUNTY WEST-IMPERIAL VALLEY-
INCLUDING THE CITIES OF CALEXICO, BRAWLEY, COYOTE WELLS, EL CENTRO,
ALAMORIO, COOLIDGE SPRINGS, OCOTILLO, MOUNTAIN SPRING, SALTON CITY,
WINONA, AND PLASTER CITY
817 PM PDT THU SEP 10 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM PDT FRIDAY
* WHAT...DANGEROUSLY HOT AND HUMID CONDITIONS. AFTERNOON TEMPERATURES
105 TO 111 EXPECTED. MAJOR HEAT RISK.
* WHERE...PORTIONS OF IMPERIAL COUNTY, INCLUDING THE IMPERIAL VALLEY.
* WHEN...UNTIL 8 PM PDT FRIDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS. OVEREXPOSURE CAN CAUSE HEAT CRAMPS AND HEAT
EXHAUSTION TO DEVELOP AND, WITHOUT INTERVENTION, CAN LEAD TO HEAT
STROKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN EXTREME HEAT WARNING MEANS THAT A PERIOD OF VERY HOT TEMPERATURES,
EVEN BY LOCAL STANDARDS, WILL OCCUR. ACTIONS SHOULD BE TAKEN TO
LESSEN THE IMPACT OF THE EXTREME HEAT.
TAKE EXTRA PRECAUTIONS IF YOU WORK OR SPEND TIME OUTSIDE. WHEN
POSSIBLE, RESCHEDULE STRENUOUS ACTIVITIES TO EARLY MORNING OR
EVENING. KNOW THE SIGNS AND SYMPTOMS OF HEAT EXHAUSTION AND HEAT
STROKE. WEAR LIGHTWEIGHT AND LOOSE-FITTING CLOTHING WHEN POSSIBLE AND
DRINK PLENTY OF WATER.
TO REDUCE RISK DURING OUTDOOR WORK, THE OCCUPATIONAL SAFETY AND
HEALTH ADMINISTRATION RECOMMENDS SCHEDULING FREQUENT REST BREAKS IN
SHADED OR AIR CONDITIONED ENVIRONMENTS. ANYONE OVERCOME BY HEAT
SHOULD BE MOVED TO A COOL AND SHADED LOCATION. HEAT STROKE IS AN
EMERGENCY! CALL 9 1 1.
PUBLIC COOLING SHELTERS ARE AVAILABLE IN SOME AREAS. CONSULT COUNTY
OFFICIALS FOR MORE DETAILS.
KB
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