I would just stay in my dorm though there is no air conditioner.
I would buy all the food from the mall, and never step out of the room.
I would put my feet in a bucket of cold water while I am playing DotA.
I would take a cold water shower every 2 hours.
I would order food instead of going to the refectory.
I would put talcum powder all over my body.
I would sleep on the ground at night, because it's cooler.
OMG!! I can't believe it's 40℃ today!!!! Shanghai is killing me, and I have to do those things above.