Mine have been having a hard time too, but thankfully we've had some rain which has lowered temps about 20 degrees. When it was super hot and humid I placed large reusable ice packs in the coop and run. I've watered their run a bit but not too much. "Smoothies" like frozen blended grapes with water, other fruits, ect. Ice in waterers. I purchased a large canvas drop cloth and attached it to a portion on the run to create more shade. It isn't even the hottest part of the year here, but there were a few days that they were really panting so I've been keeping an eye on them.