Extreme Heat Warning for Grand Canyon Country Through Friday Evening
The National Weather Service warns of dangerously hot conditions in the lower Grand Canyon through 8 PM MST Friday, August 28, when the warning expires.
2 reports on this incident · first at Aug 24, 2026, 3:51 a.m. ET
Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
We last searched for new coverage of this at Aug 24, 2026, 4:09 a.m. ET — checked 3h ago.
Earlier reports
Aug 24, 2026, 3:51 a.m. ETFirst report
Extreme Heat Warning for Grand Canyon Country Through Friday Evening
The National Weather Service in Flagstaff, Arizona, has issued an Extreme Heat Warning for lower elevations of the Grand Canyon, effective from 10 AM MST Wednesday, August 26, 2026, to 8 PM MST Friday, August 28, 2026. The warning covers Grand Canyon Country, including the North Rim, Tusayan, Supai, and Grand Canyon Village, and is in effect for two zones.
Daytime temperatures are expected to range from 95 to 101 degrees at Havasupai Gardens and 107 to 112 degrees at Phantom Ranch. The warning states that most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure.
The advisory recommends that day hikers on Bright Angel Trail descend no farther than 1 1/2 miles from the upper trailhead, and that hikers be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds between 10 AM and 4 PM. It advises carrying adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix, and doubling calorie intake to maintain energy. Anyone overcome by heat should be moved to a cool and shaded location, and heat stroke is an emergency—call 9 1 1.
The warning expires at 8 PM MST Friday, August 28, 2026.
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Revision history
- Version 124 Aug 2026, 07:52current
First published.
- Version 124 Aug 2026, 07:51current
First published.
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