We get temps up to 115 here, and I used to put frozen water bottles in with them to stay cool (they make a mess though, so I stopped that), as well as hosing down surrounding areas, misting them, spraying the dirt, freezing our watermelon rinds to feed during peak time in the day and freezing small blocks of ice to put in their waterers. Everyone has plenty of shade, but they still get hot. I can't really help that, except for making them as comfortable as possible, while keeping areas cool. I also have Jersey giants (the biggest birds) and they are doing fine.