I am having the same problem with my grow too. Plants can handle the heat its just like everyone else is saying.......in the long run growth is stunted and yield definitely goes down. I might have to buy an AC unit for the room because my grow sits at like a constant 92, plants are doing just fine though.
Check it out maybe we could pick up a thing or two.........its in my sig down at the bottom there.
Good luck with that heat and happy growings!