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Extreme Heat Alert Issued for Grand Canyon Hikers
11 Jun
Summary
- Extreme heat warning issued for Grand Canyon Country on June 10, 2026.
- Temperatures expected to reach 110 degrees Fahrenheit at Phantom Ranch.
- Hikers advised to limit activity and carry ample water and salty snacks.
The National Weather Service in Flagstaff issued an extreme heat warning for Grand Canyon Country on June 10, 2026. This alert signifies exceptionally high temperatures, reserved for the hottest days of the year.
Below 4,000 feet, daytime temperatures are predicted to range from 101 degrees Fahrenheit at Havasupai Gardens to 110 degrees Fahrenheit at Phantom Ranch. This dangerous heat is expected from 10 a.m. to 8 p.m. MST on June 11, 2026. Most individuals face a significant risk of heat-related illnesses if exposed outdoors without adequate hydration and cooling.
Hikers planning to visit the Bright Angel Trail are cautioned to descend no farther than 1 1/2 miles from the upper trailhead. Between 10 a.m. and 4 p.m., hikers should be at either the Havasupai Gardens or Bright Angel campgrounds, with physical activity strongly discouraged. Essential gear includes hats, sunscreen, salty snacks, sufficient water, and electrolyte mixes, with hikers encouraged to double their calorie intake.
