The President went to the border wall (paid for by Mexico...NOT) yesterday in Yuma, Arizona, which is around 1.5 hours south of Phoenix by car, IIRC. It was 111 degrees in Phoenix yesterday. The President and the other males in his entourage, other than a military guy dressed in fatigues, all wore suits and ties, or at least a sports coat and tie. Almost none of them wore a hat. Almost none had sunglasses.
Not sure how long they were out in the heat. I'd be outside in a jacket and tie for about 5 seconds in that kind of heat and sun and would collapse.
I've always thought that the state motto of Arizona should be "It's a dry heat."