156
WWUS75 KFGZ 290418
NPWFGZ

URGENT - WEATHER MESSAGE
National Weather Service Flagstaff AZ
918 PM MST Tue Jul 28 2026

AZZ006-301900-
/O.CON.KFGZ.XH.W.0007.260730T1700Z-260803T0300Z/
Grand Canyon Country-
Including the cities of Grand Canyon Village, Grand Canyon North Rim,
Tusayan, and Supai
918 PM MST Tue Jul 28 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM THURSDAY TO 8 PM
MST SUNDAY BELOW 4000 FEET...

* WHAT...Dangerously hot conditions expected below 4000 feet, with
  daytime temperatures ranging from 104 to 109 degrees at Havasupai
  Gardens, and 112 to 117 degrees at Phantom Ranch.

* WHERE...Lower elevations of the Grand Canyon.

* WHEN...From 10 AM Thursday to 8 PM MST Sunday.

* 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.

&&

$$

AZZ005-038-301900-
/O.CON.KFGZ.XH.W.0007.260731T1700Z-260803T0300Z/
Marble and Glen Canyons-Oak Creek and Sycamore Canyons-
Including the cities of Page, Village of Oak Creek, Lees Ferry, and
Sedona
918 PM MST Tue Jul 28 2026 /1018 PM MDT Tue Jul 28 2026/

...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM MST /11 AM MDT/
FRIDAY TO 8 PM MST /9 PM MDT/ SUNDAY...

* WHAT...Dangerously hot conditions, with temperatures around 105 to
  110 expected.

* WHERE...Marble Canyon, Glen Canyon, and Oak Creek Canyon; including
  Page and Sedona.

* WHEN...From 10 AM MST /11 AM MDT/ Friday to 8 PM MST /9 PM MDT/
  Sunday.

* 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.

&&

$$

AZZ018-037-301900-
/O.CON.KFGZ.XH.W.0007.260731T1700Z-260803T0300Z/
Northern Gila County-Yavapai County Valleys and Basins-
Including the cities of Cottonwood, Young, Strawberry, Cordes
Junction, Payson, Bagdad, and Camp Verde
918 PM MST Tue Jul 28 2026

...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM FRIDAY TO 8 PM
MST SUNDAY BELOW 4000 FEET...

* WHAT...Dangerously hot conditions, with temperatures around 108 to
  115 expected below 4000 feet.

* WHERE...northern Gila and Yavapai counties below 4000 feet;
  including the Verde Valley and Black Canyon City.

* WHEN...From 10 AM Friday to 8 PM MST Sunday.

* 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