751
WWUS75 KTWC 250929
NPWTWC
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE TUCSON AZ
229 AM MST SAT JUL 25 2026
AZZ501-502-504>506-509-260300-
/O.CON.KTWC.XH.W.0004.000000T0000Z-260726T0300Z/
WESTERN PIMA COUNTY-TOHONO O'ODHAM NATION-TUCSON METRO AREA-SOUTH
CENTRAL PINAL COUNTY-SOUTHEAST PINAL COUNTY-UPPER GILA RIVER
VALLEY-
INCLUDING THE CITIES OF CLIFTON, SAFFORD, MAMMOTH, GREEN VALLEY,
VAIL, TUCSON, MARANA, ORACLE, ORGAN PIPE CACTUS N.M., SELLS,
PICACHO PEAK STATE PARK, AND AJO
229 AM MST SAT JUL 25 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES OF 105 TO 113
DEGREES EXPECTED WITH MAJOR TO EXTREME HEATRISK.
* WHERE...SOUTHEAST PINAL COUNTY, TOHONO O'ODHAM NATION, TUCSON METRO
AREA, UPPER GILA RIVER VALLEY, AND WESTERN PIMA COUNTY.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
* ADDITIONAL DETAILS...WARM OVERNIGHT LOW TEMPERATURES OF 82 TO 88
DEGREES WILL PROVIDE LITTLE TO NO RELIEF FROM HEAT OVERNIGHT.
WARMEST OVERNIGHT LOW TEMPERATURES EXPECTED IN THE WESTERN DESERTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
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.
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.
AZZ503-507-508-260300-
/O.CON.KTWC.XH.W.0004.000000T0000Z-260726T0300Z/
UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY-UPPER SAN PEDRO RIVER
VALLEY-EASTERN COCHISE COUNTY BELOW 5000 FEET-
INCLUDING THE CITIES OF NOGALES, SIERRA VISTA, DOUGLAS, WILLCOX, AND
BENSON
229 AM MST SAT JUL 25 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS
EVENING...
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES OF 100 TO 105
EXPECTED WITH MAJOR HEATRISK.
* WHERE...EASTERN COCHISE COUNTY BELOW 5000 FEET, UPPER SAN PEDRO
RIVER VALLEY, AND UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT LEAVE YOUNG CHILDREN AND PETS IN UNATTENDED VEHICLES. CAR
INTERIORS WILL REACH LETHAL TEMPERATURES IN A MATTER OF MINUTES.
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.
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.
AWH
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