By the way, you won't want to wet any birds other than waterfowl. Wetting chickens can cause problems; just spot wet their combs, etc.
However, having a mister in the room is a brilliant way to keep them cool. You can find misters for porches in many hardware stores.
We're having the same problems down here in Houston. (Bless the Gulf for making us suffer in the summer. heheh)
I have chicks and poults and goslings. I'm about to start freezing water in jugs. I'm also considering freezing small ddrinking bottles of water and floating those in their bigger waterers. Or putting the frozen jugs of water on top of their waterers as cool goes down.
For the bigger outside birds, we have a shallow baby wading pool. My turkey hens get in it and will stand there all day. I put mine under leaves and wet the leaves and ground daily. Pick a spot where the sun never hits the ground as that will be cooler - or where they usually hang out. The wet ground and overhanging leaves make an airconditioned area that, since the sun doesn't hit that spot, stays cool all day. If the sun DOES hit it, use a sunshade of some sort.
I'm also thinking about using a little chicken electrolyte in the water - but very very dilute. The birds drink a lot more water in the heat, so I don't want to overload them. I also don't like things in the water as I feel it creates an environment for bacteria to thrive. But I'm still considering a little electrolyte in the chicks/poults water. Just a smidgeon.
Be sure to also take care of yourself in the heat; being as you're from Florida, I don't have to remind you of that. I've found that drinking gatorade 10 minutes before doing my chores makes me feel a lot better while doing them!
Take care!