It has been 100+ where I live in Southeast Texas for 3 days now! I figured out a way to get part of my outdoor, open coop and small run area down to 85 degrees! Yay! Click here to see pics of my coop and chicken tent: https://www.backyardchickens.com/forum/viewtopic.php?id=514700 It's all under a big magnolia tree but the coop gets full sun on the open side from about 10am to 1pm. I've been trying to figure out a cheap and easy cooling system as I don't have electricity running out to the coop yet and plan to go out of town for a few days soon. I'll have someone check on them, but not every hour like I do when I'm worried about them in the heat.. kwim? LOL So, anyways, I bought a light, knit, twin size blanket (the green one) at Walmart: http://www.walmart.com/ip/Mainstays-Cotton-Blanket/16783814 I draped and stapled the blanket to the side of the coop that gets the most sun. I bought two cheap "cobra" misters from lowe's and hooked them up to spray directly onto the blanket from the outside of the coop. I also give the blanket a good wet-down with the hose every now and then. It has brought the temps down to 85 on the side of the coop where the blanket is! I'm so happy as this will be really easy to have a baby sitter maintain for me while I'm out of town. Thought I'd share in case anyone else wants to try something similar.