A wide, flat container like a dish pan with an airstone in it set in fron tof your fan will raise humidity.
1-4puff, if your temps get any higher you need to add humidity- either way, you should try to drop them back down below 80. BTW is that your dog? I've got an Olde English bulldogge mix with a similar look to her.
Chron, there's a thread cdalled is heat really that bad, where rhizome gets into a neat discussion of osmotic pressure deficit or whatever it's called, basically,getiing your plants to keep the stomata open and continue to transpire by keeping some humidity in the air.