Fans are about the best you're gonna get in that weather.We've got fans out the ass. When the ambient air is 115 degrees with 100% humidity, fans alone basically just push hot air at you. They're better than nothing, but they are far from a solution.
although... if your main issue with the water cooler is the mozzie larvae in the reservoir... then just lay wet tea towels/dishcloths across the front of your fans and re-wet them every hour or so. Gives the same result except with a bit more legwork but there's no large enough pool of water to interest the mosquitoes.
Also, what you really want is a friend who mosquitos will just swarm on and ignore everyone else. Sucks for them but great to have around in summer.