ARLINGTON, TX - AUGUST 12: Fans look at the weather radar on a smartphone during a rain delay between the Detroit Tigers and the Texas Rangers at Globe Life Park in Arlington on August 12, 2016 in Arlington, Texas. (Photo by Ronald Martinez/Getty Images)

People swim at the Capitol Skyline Hotel 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

People swim at the Capitol Skyline Hotel 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

People walks 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

A boy sits 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

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

People paddle on kayaks across the Potomac river 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

A woman shades herself from the sun with an umbrella as she walks 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