Grand Canyon National Park trails never close due to extreme hot weather. But just because they are always open, does not mean you should go.
Arizona has seen record temperatures in recent weeks and its only June. Those record highs can be life threatening if you are unprepared and don’t take the weather seriously.
Temperatures also vary significantly from the rim of the Grand Canyon to the bottom. It can be 80 degrees when you start your hike, but the temperature will quickly increase as you descend. If safety measures aren’t taken, any unprepared hiker can be affected by heat-related illnesses, some of which can be fatal...