Coop has fans but also is insulated so it stays cooler than the sheds with no insulation.
Plenty of fresh water in the coop because I noticed if water is outside it gets nasty from getting dirt kicked in and/or just turns green & slimy from being out. The waterers elevated on 6 inch landscape block stay clean and slime free inside.
Their runs always have a bit of sun, and a lot of shade & shelter no matter what the season.
Their dust bath areas are in shade. 1 dust bath area is dug very deep and they love that one when it's hot.
I have offered occasional frozen peas or corn at times, hang a cabbage head from the refrigerator, blueberries or strawberries from the fridge at times, they enjoy very much.
We just had 6 weeks of no rain & a very hot July like weather weekend in May, so most grass on my 2 acres is "crunchy when you walk" dead, only 2 small areas in the chicken pens still have grass! The greens I had growing up through wire for them to peck at has died, too. That's a negative abt hot weather, but it is what it is, gotta deal with it. As long as my flock is happy, we're OK