NWS Forecast Office Flagstaff, AZ

Very hot temperatures will develop on Tuesday, especially across the lower elevations of the Grand Canyon where temperatures could reach up to 110°F. If recreating outdoors, limit outdoor exposure and physical activity to early morning or late evening, stay hydrated, wear lightweight clothing and use sunscreen. Don’t assume the temperatures at the north and south rim are representative of the temperatures down in the lower elevations of the Grand Canyon.

If you plan to be outdoors, be sure to check the forecastbefore venturing out. Have a good way to receive warnings, like reliable cell phone service. Head indoors when you hear thunder or see lightning.