Weather Alerts For Grand Canyon Natl Park, AZ

# HEADLINE -------------------- EXTREME HEAT WARNING IN EFFECT FROM 10 AM WEDNESDAY TO 8 PM MST FRIDAY BELOW 4000 FEET # DETAILS -------------------- WHAT Dangerously hot conditions expected below 4000 feet, with daytime temperatures ranging from 95 to 101 degrees at Havasupai Gardens, to 107 to 112 degrees at Phantom Ranch. WHERE Lower elevations of the Grand Canyon. WHEN From 10 AM Wednesday to 8 PM MST Friday. IMPACTS Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. ISSUED AT Monday, August 24, 2026 at 12:46 AM MST ISSUED BY National Weather Service Flagstaff AZ HEADER URGENT - WEATHER MESSAGE # 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. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. # AREAS AFFECTED -------------------- Grand Canyon Country Including the cities of Grand Canyon North Rim, Tusayan, Supai, and Grand Canyon Village