064
WWUS75 KFGZ 281640
NPWFGZ
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
940 AM MST FRI AUG 28 2026
AZZ006-290300-
/O.CON.KFGZ.XH.W.0014.000000T0000Z-260829T0300Z/
GRAND CANYON COUNTRY-
INCLUDING THE CITIES OF GRAND CANYON VILLAGE, GRAND CANYON NORTH RIM,
TUSAYAN, AND SUPAI
940 AM MST FRI AUG 28 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING
BELOW 4000 FEET...
* WHAT...DANGEROUSLY HOT CONDITIONS EXPECTED BELOW 4000 FEET, WITH
DAYTIME TEMPERATURES RANGING FROM 93 TO 97 DEGREES AT HAVASUPAI
GARDENS, TO 106 TO 110 DEGREES AT PHANTOM RANCH.
* WHERE...LOWER ELEVATIONS OF THE GRAND CANYON.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...MOST INDIVIDUALS WILL BE AT RISK FOR HEAT-RELATED
ILLNESSES WITHOUT EFFECTIVE COOLING OR ADEQUATE HYDRATION,
ESPECIALLY WITH PROLONGED OUTDOOR EXPOSURE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS WARNING IS RESERVED FOR ONLY THE HOTTEST DAYS OF THE YEAR AND IS
ISSUED WHEN TEMPERATURES ARE EXPECTED TO RISE TO DANGEROUS LEVELS.
DAY HIKERS ON BRIGHT ANGEL TRAIL SHOULD DESCEND NO FARTHER THAN 1 1/2
MILES FROM THE UPPER TRAILHEAD. BETWEEN THE HOURS OF 10 AM AND 4 PM,
HIKERS SHOULD BE OUT OF THE CANYON OR AT HAVASUPAI GARDENS OR BRIGHT
ANGEL CAMPGROUNDS, PHYSICAL ACTIVITY IS DISCOURAGED. ALL HIKERS
SHOULD HAVE ADEQUATE GEAR, INCLUDING A WIDE-BRIMMED HAT, SUNSCREEN,
SALTY SNACKS, SUFFICIENT WATER, AND ELECTROLYTE MIX. DOUBLING YOUR
CALORIE INTAKE HELPS MAINTAIN YOUR ENERGY.
HIKE SMART.
TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE.
ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED
LOCATION. HEAT STROKE IS AN EMERGENCY! CALL 9 1 1.
AZZ037-290300-
/O.CON.KFGZ.XH.W.0014.000000T0000Z-260829T0300Z/
YAVAPAI COUNTY VALLEYS AND BASINS-
INCLUDING THE CITIES OF COTTONWOOD, CAMP VERDE, CORDES JUNCTION, AND
BAGDAD
940 AM MST FRI AUG 28 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST THIS EVENING
BELOW 4000 FEET...
* WHAT...DANGEROUSLY HOT CONDITIONS, WITH TEMPERATURES AROUND 105 TO
110 EXPECTED BELOW 4000 FEET.
* WHERE...YAVAPAI COUNTY BELOW 4000 FEET; INCLUDING THE VERDE VALLEY
AND BLACK CANYON CITY.
* WHEN...UNTIL 8 PM MST THIS EVENING.
* IMPACTS...MOST INDIVIDUALS WILL BE AT RISK FOR HEAT-RELATED
ILLNESSES WITHOUT EFFECTIVE COOLING OR ADEQUATE HYDRATION,
ESPECIALLY WITH PROLONGED OUTDOOR EXPOSURE.
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.
TAKE ACTION WHEN YOU SEE SYMPTOMS OF HEAT EXHAUSTION AND HEAT STROKE.
ANYONE OVERCOME BY HEAT SHOULD BE MOVED TO A COOL AND SHADED
LOCATION. HEAT STROKE IS AN EMERGENCY! CALL 9 1 1.
STAY COOL, STAY HYDRATED, STAY INFORMED.
HUMPHREYS
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