36°54'N / 111°27'W / Altitude 1326 m / 02:06 2026/03/19, America/Denver (UTC-6)
From: 2026/03/18, 13:56
To: 2026/03/19, 18:00
* WHAT...Dangerously hot conditions below 4000 feet, with daytime temperatures ranging from 94 degrees at Havasupai Gardens, to 100 degrees at Phantom Ranch.
* WHERE...Lower elevations of the Grand Canyon.
* WHEN...Until 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.
Coconino
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.
NWS Flagstaff AZ
2026/03/18, 13:56