Here in Ohio it's been super hot too....very humid and nearly 90 degrees--88 yesterday. I am lucky to have lots of shade for my flock of 20, and I've been out replacing their water a few times a day.......this heat is really unbearable....poor chickens have been breathing with their beaks open, and holding their wings out to cool off.....A good idea is also to mist your chickens with some water. They really don't mind water......