Here in the United States the majority of states are bracing for an extremely warm summer this year. But in some parts of the world, it seems that extreme heat, like the kind seen in India, is becoming the new normal. Last summer, temperatures in Iran reached 115 degrees Fahrenheit, but felt like 165 degrees Fahrenheit thanks to the high humidity in the region. And it's not likely to get better. Multiple studies have predicted an increase in both the frequency and intensity of heat waves within the next century, both on a regional and worldwide basis.