Isn't this heat awful for so early??
I've made a shady spot for their big water dish so I don't have to replace the warm water so often.
I have some in a smaller pen that gets a cross breeze, and in the hottest part of the day I set up a hose with a "mist" option so that it sprays across the entrance, and it cools off their area quite nicely. It's really amazing how that mist will cool the nearby air. They don't like to be in the mist, but near it it's cooler.
I make sure their indoor coops are open for a good cross breeze. I've put 2 liter ice bottles in nesting boxes before, and especially with broodies. You have to keep rotating those in and out of the freezer. Be careful about contamination in your freezer!
Don't feed them scratch mix with corn, as that is supposed to warm them up. It's nice for cold winter days.
Any more ideas, anyone?