How to stay cool at a VERY hot school?

It is supposed to reach up to 95 degrees farenheit this week and my school has no air conditioning. I pretty much spend all day at the top floor of my building so it's even warmer inside then outside. We always keep the windows open but it doesn't really help. It's also humid. Tomorrow i get to wear basketball shorts and a t-shirt, but the days after that i need to wear a skirt, shorts underneath, optional knee socks, and polo shirt. (i need to wear a cami underneath, the shirt is see through. Is there ANYTHING at all i can do to help keep me as cool as possible, or at least stop me from getting stinky because of the sweat? (i sweat mostly on my palms and underarms.) THANKS!