Visitors to Grand Canyon National Park are being warned about extreme heat that will plague the popular destination early next week after a recent increase in heat-related incidents in the inner canyon, including the deaths of three hikers.
The U.S. National Weather Service issued an extreme heat watch at the Grand Canyon for midday Monday through Tuesday, forecasting temperatures that could reach or exceed 110 degrees Fahrenheit (43 degrees Celsius) at the low-elevation Phantom Ranch.