It's supposed to be 100 degrees fahrenheit tomorrow and my school does not have air conditioning?

Hey, so today it was 95 degrees and school today was absolutely brutal because we don't have air conditioning. Our school board is full of some of he cheapest bas****s ever so they refuse to get ac for the school. Anyway, tomorrow it is supposed to reach 100 degrees, and if you add in the humidity factor, it is going to feel like 105. I also have one test and a final tomorrow. The thermometer in the rooms today said it was 100 because of 35 kids being crammed into one classroom so tomorrow it will surely reach close to 110. Any tips on staying cool? I'm worried about bombing my final because of this awful heat.