Weather Alerts-

Execute a pre-planned activity identified in the instructions

Flagstaff - AZ, US, National Weather Service

Lower elevations of the Grand Canyon

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM MST SUNDAY BELOW 4000 FEET... 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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.