Hello from NEOhio "kinsman" we have an amazing group of chickens. I specialize in Welsummer, Brahmas, and Barred Plymouth Rocks. But have about 40 different breeds.
We have 3 four month old Welsummer Roos if anyone is interested
As well as 7 three month old mixed Roos available
Get bags of ice and put it in front of a box fan point fan on your girls it helps a lot. Also freeze pumpkin or corn in ice trays to give them cold treats. We also give them kiddy pools they dip there feet in to cool off.
Good luck