With a misting system in their run and frozen gallon jugs of water and plenty of ice water in their waterers! Oh and plenty of dirt baths :) I too worry about the summers here but I keep a very close eye on them to the point of becoming neurotic.
Ugh, all the hinges and latches, etc. on my coop and run are frozen over and we are having another hard freeze tonight. I have new respect for all the northerners and mid-westerners right now. The coop has like an inch of ice sitting on it right now which is pretty solid. I'm hoping it...
It's about 26 here right now in lovely Dallas TX and my hens are wandering the yard like it's a beautiful spring day. They aren't loving all the ice, but they seem fine. I am sure if yours have the option to go in and out of the coop if they decide to seek shelter during the day, they should...