I almost lost one of my girls in the heat this year, it was 118. Luckily there is a vet that sees chickens in Mesa. I have since then added misters to the run I have, added tarps, and grass to help keep thier feet cool. If you can, add water to float some of thier food, they are cooled down with thier feet, so I had a kiddie pool and throw in some frozen fruit and it helps. For nights, I used a evaporator cooler to keep thier coop cool at nights, I'll probably get a window cooler before this summer comes back. For our winter, try to make sure their enclosure is protected from wind, they can warm themselves up really well, but if it's open, then it's harder. Our girls hatch day us this month, we love them.