A tourist rests near a fountain on the National Mall during warm weather August 12, 2016 in Washington, DC. Millions of Americans will spend the weekend hot under the collar as soaring East Coast temperatures and stifling humidity slapped excessive weather warnings. The heatwave stretches from southwest Ohio to west Virginia, Washington DC, Boston, New York and Philadelphia, according to the National Weather Service. / AFP PHOTO / Brendan SmialowskiBRENDAN SMIALOWSKI/AFP/Getty Images