I have a crazy 8 ft tall brick arch on my property. It might be neat if it wasn't falling apart and located about a foot from my privacy fence. The chickens, however, really like it. They like to hang out between the arch and the fence because it is shaded all day long. They have little holes dug in the, what it now dirt, and lay in those against the cool ground to keep cool.
I had my daughter go out and mist them with the hose this afternoon. Even with the sprayer on mist mode it freaked them out. She sprayed out the grass around their coop and run where they like to hang out. I changed their water earlier put a shallow kitty litter pan full of water for a wading pool. They drank out of it but I didn't see anyone try to walk in it, though they walk in and on everything else.
I bought a little fan that is used in pet crates to stick in the coop on really hot nights to circulate the air. Their coop is in the shade most of the afternoon so at least it doesn't get all heated up by the sun.
I've never worried about the comfort of a little thing this much since my kids were babies!