 So most humans will get much hotter than the 1.5 or 2 or 3 degrees C warming discussed by world scientists and governments. I can't stress this enough. Most humans, most of you, will experience heat well beyond that. At times, Dr. Zhao tells us, cities will reach heat as much as 7 degrees C, that is 12 degrees Fahrenheit, hotter than the surrounding countryside, which is already sizzling.