Extreme Heat Warning for Grand Canyon Country
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An Extreme Heat Warning is in effect for lower elevations of the Grand Canyon below 4000 feet until 8 PM MST Friday.
Read this weather record in 30 seconds
- Record type
- Extreme Heat Warning
- Affected area
- Grand Canyon Country
- Issued
- August 5, 2026
- Issuing authority
- NWS Flagstaff AZ
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: publication date is recent, but current status is not stored on this page. Check the issuing agency's live warning service before acting because warnings can be updated, narrowed, or cancelled.
Alert Details
Extreme Heat Warning issued by NWS Flagstaff AZ. The alert is effective from August 4, 2026 at 8:28 PM MST and remains in effect until August 7, 2026 at 8:00 PM MST.
Affected Areas
Lower elevations of the Grand Canyon Country below 4000 feet, including areas such as Havasupai Gardens and Phantom Ranch.
What You Should Do
Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between 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 carry a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling calorie intake helps maintain energy.
Expected Conditions
Dangerously hot conditions with daytime temperatures ranging from 95 degrees at Havasupai Gardens to 112 degrees at Phantom Ranch.
Timeline
The warning is in effect from August 4, 2026 at 8:28 PM MST through August 7, 2026 at 8:00 PM MST.
Original source: NOAA Official Notice ↗
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