How I coped with the heat waves last summer : 

This summer, I dealt with the heat waves by, first, drinking a lot of water since being hydrated is important, then by doing activities in the nature, mostly by swimming of riding boat in river where water is cooler than in the sea. I also used the fan quite a lot when i wanted to stay home. Sometimes when I could, i also went to pool with some friends; that helps when the heat is harsh.