Headline:
Extreme Heat Warning issued August 9 at 12:31AM MST until August 9 at 8:00PM MST by NWS Flagstaff AZ
Event:
Extreme Heat Warning
Urgency:
Expected
Effective:
August 9, 2026 - 12:31am
Expires:
August 9, 2026 - 8:00pm
Description:
* WHAT...Dangerously hot conditions expected below 4500 feet, with
daytime temperatures ranging from 95 to 105 degrees at Havasupai
Gardens, 110 to 115 degrees at Phantom Ranch, and 102 to 106 at
Page.
* WHERE...Lower elevations of the Grand Canyon, and Marble and Glen
Canyons; including Page and Phantom Ranch.
* WHEN...From 9 AM MST /10 AM MDT/ this morning to 8 PM MST /9 PM
MDT/ this evening.
* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure.
Instruction:
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.
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.
Area Description:
Marble and Glen Canyons; Grand Canyon Country
Forcast Office:
NWS Flagstaff AZ
Sender:
w-nws.webmaster@noaa.gov