Anything over 80 degrees in Oregon is not weather it is punishment. What we do here in West Texas if the frozen jugs of water thing but we put them in their coop where it is a bit darker and where they are comfortable and safe. We have a fan that is actually outside the coop but blows in through a window then we hang a jug or two (from a chain) inside the coop where the fan wind blows over the bottles. That, and the frozen bottles on the floor, actually lowers the temp in the coop by 10-20 degrees plus it creates a nice cool breeze. My hens then spend their day playing snuggle with frozen milk jugs. Here we want to not only keep them out of the hot air outside but out of the sun when can be deadly. Just FYI. When they say it is going to be 106 that is the predicted temp measured in the shade. Sun temps will usually be as much as 25 degrees hotter than that.