This heat wave would be ‘virtually impossible’ if not for fossil fuel pollution, study says

A dangerous heat wave is tightening its grip on the East Coast, with the worst conditions underway as millions prepare to celebrate the Fourth of July outdoors.

​ A dangerous heat wave is tightening its grip on the East Coast, with the worst conditions underway as millions prepare to celebrate the Fourth of July outdoors. Read More Breaking News, Latest News and Videos | CNN