As far as I know, nobody has screens in Texas either. My parents' house doesn't even seem to have openable windows. Back in Colorado we had screens on every window and door, and no AC. Never seemed all that hot, except for maybe a couple deadly weeks in late August. My roommate and I actually tried to build an air conditioner using a trash can, a couple pieces of garden hose, and an oil cooler from a Volkswagen bug. Didn't work, but it kept us occupied until it was time to go drink.