365 WWUS75 KFGZ 281910 NPWFGZ URGENT - WEATHER MESSAGE National Weather Service Flagstaff AZ 1210 PM MST Wed Jun 28 2023 AZZ006-290315- /O.NEW.KFGZ.EH.A.0001.230701T1700Z-230706T0300Z/ Grand Canyon Country- Including the cities of Grand Canyon Village, Supai, and North Rim 1210 PM MST Wed Jun 28 2023 ...EXCESSIVE HEAT WATCH IN EFFECT FROM SATURDAY MORNING THROUGH WEDNESDAY EVENING BELOW 4000 FEET... * WHAT...Dangerously hot conditions, with daytime temperatures ranging from 104 degrees at Havasupai Gardens, to 115 degrees at Phantom Ranch. * WHERE...The Grand Canyon below 4000 feet, including along the Colorado River and Phantom Ranch. * WHEN...From Saturday morning through Wednesday evening. * IMPACTS...Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities. 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 further 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. && $$ For more information from the National Weather Service visit https://weather.gov/flagstaff