Extreme Heat Warning for Marble and Glen Canyons; Grand Canyon Country
Official alert fields
What you need to know
- Applies to
- Grand Canyon Country, Marble and Glen Canyons
- Effective
- Ended
- Official severity
- Severe
- Official urgency
- Expected
- Official certainty
- Likely
What is happening
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. Impacts: Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration,...
What the bulletin says to do
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.
Full official description
Bulletin details
* 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.
Lifecycle record
Official revisions
- Alert
Extreme Heat Warning issued August 9 at 12:31AM MST until August 9 at 8:00PM MST by NWS Flagstaff AZ
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Flagstaff AZ. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Alert
- Last collected