I'm sure the heat can be horrible. I'm making my coop as open as I can. Basically framed chicken wire on two sides so they have plenty of air flow. I'll do everything I can to help them stay cool. Sadly I don't have a lot of shade, just on one side of my house. Once my daughters have left the nest and have taken their dogs, I'm sure the chickens will spend a lot of time on that side of the house haha. I plan to plant some shade loving plants over there for them.