How old are the chicks? If they're big enough, I put out aluminium roaster pans from the $ store, put a decent sized rock in the middle and fill them w/cold water. They both drink from them and wade through them
I also put frozen water bottles in their waterers. Mine free-range, so there are about 1/2 dozen near their favourite hangouts. They also love watermelon, actually any type of melon
Check out this video of how to make a fan with ice chest kind of like an ac system with a box fan.
[/https://youtu.be/NiPLJEFRBnM