I am in Phoenix, our weather popped up to 108 today and we lost a hen. We had good shade, completely open ventilated area and a fan, water to stand in, At noon all was well, this evening one dead hen. I ran out to Home Depot and got a mister line and a filter for the hard water for both yards to be put up in the morning. We had planned to do it this weekend. Too late. We had Buff Orphingtons in that run. I knew they would not do well in the heat, just thought I had a few more days before it got really hot. It will get up to probably 115 at least this summer. For months on end.