I recall being at the Petrified Forrest in Arizona in 115 degree heat. It really didn’t seem that bad, at first. I took a short hike around a loop called The Chrystal Forrest, and within 400 yards I was in trouble. The air is so dry the water is just sucked out through your lungs. You either have to be used to it, or have a lot of water handy. Later, I was driving down some lonely back road from Phoenix to Ajo through the desert, and every now and again I would see some baked, thin, zombie-like figure stumbling along the roadside. I wondered how they could possibly survive.
WHO plans hikes in AZ in June? I may be crazy but I am not stupid. As a life long golfer, I know when to avoid playing, like 90 deg plus.