395
WWUS75 KTWC 282100
NPWTWC
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE TUCSON AZ
200 PM MST FRI AUG 28 2026
AZZ501-502-504>506-509-291200-
/O.CON.KTWC.XH.W.0006.000000T0000Z-260830T0300Z/
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 VAIL, AJO, GREEN VALLEY, CLIFTON, MARANA,
MAMMOTH, SAFFORD, ORGAN PIPE CACTUS N.M., TUCSON, PICACHO PEAK
STATE PARK, SELLS, AND ORACLE
200 PM MST FRI AUG 28 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HIGH TEMPERATURES RANGING
BETWEEN 104 TO 110 DEGREES AND LOW TEMPERATURES 79 TO 85 DEGREES.
MAJOR TO EXTREME HEATRISK TODAY THROUGH SATURDAY.
* WHERE...PINAL COUNTY, TOHONO O'ODHAM NATION, TUCSON METRO AREA,
UPPER GILA RIVER VALLEY, AND WESTERN PIMA COUNTY.
* WHEN...UNTIL 8 PM MST SATURDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
AZZ503-507-508-291200-
/O.CON.KTWC.XH.W.0006.000000T0000Z-260830T0300Z/
UPPER SANTA CRUZ RIVER VALLEY/ALTAR VALLEY-UPPER SAN PEDRO RIVER
VALLEY-EASTERN COCHISE COUNTY BELOW 5000 FEET-
INCLUDING THE CITIES OF WILLCOX, NOGALES, SIERRA VISTA, DOUGLAS, AND
BENSON
200 PM MST FRI AUG 28 2026
..EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SATURDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH TEMPERATURES 98 TO 105
DEGREES. OVERNIGHT LOWS 71 TO 78 DEGREES. MAJOR HEATRISK IS
EXPECTED TODAY THROUGH SATURDAY WITH ISOLATED EXTREME HEATRISK.
* WHERE...PINAL COUNTY, TOHONO O'ODHAM NATION, TUCSON METRO AREA,
UPPER GILA RIVER VALLEY, AND WESTERN PIMA COUNTY.
* WHEN...UNTIL 8 PM MST SATURDAY.
* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING
EXTREME HEAT EVENTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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.
JT
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