We open windows and used a godawful number of fans for years. It's been getting hotter every summer though and I can't take it anymore. We broke down and got new ducting, forced air unit and central a/c. The heating and cooling can be turned on in just one room so it's easy to cool just the bedroom at night which is nice. Rainy today though.
My doc recently instructed me to only drink about 8 cups of water then drink Gatorade or another electrolyte drink. I add a bit of water to it so its tolerable.
I also have sliding windows.