I had buffs in a cold climate, and now BBS in a hot one. My current flock hatched at the end of June last year so were young during the summer heat (ahem - a dry heat...). They and I wilted above 90*, but the intense heat was usually gone after dark. Even so, I put ice in their water and froze plastic jugs of water for them to sit on or lean against, especially in the late afternoon. I also set up a fan in the coop to blow the hot air around. I will use those tactics this summer and am seriously thinking of setting up a mister outside to help cool them.
One of my hens is a lap chicken, and hops onto my lap almost every time I sit down in their pen. Another hadn't been laying eggs for more than a couple of weeks before she went broody! She is the proud momma of one chick and dotes on it.
Orpingtons are the only breed of chickens I have ever had, and I love the breed!