I'm so sorry to hear that. It's 115 here at my house too. I've got portable and window A/C units in the chicken cabin (it has 4 pens inside it), plus I'm doing all you indicated, plus I got out every hour to check on the birds, cool down the soil by spraying it with water, have misters running, feed them frozen and chilled treats, and also keep a hose running to create a stream of cool water for them to scratch in. If any of them "tell" me they're on the verge of heat stroke, I bring them into the air conditioned house and store them in my enclosed shower until they cool off. (I keep the temp in the house around 72 degrees.)
Yeah...I'm working overtime to keep my birds alive.