We're no where near as uncomfortable as you since we have DRRRRRYYYYYY desert heat, but I do go out in the evening and really soak the ground in the run leaving sprinklers on while I do chores. I turn it off after 30 minutes or so and then the ground cools off overnight. In the morning the girls run out to that wet dirt and get a good cool dust bath. I often repeat the watering around noon on really hot days so the girls can get an afternoon dust bath to cool off as well. On just awful days I leave a little sprinkler running in the chicken run somewhere in the shade.
Otherwise, all of the above...frozen melons, ice chunks, kiddie pool, fans, open all the windows, leave doors open, provide more shade
Otherwise, all of the above...frozen melons, ice chunks, kiddie pool, fans, open all the windows, leave doors open, provide more shade