3:36ABC NewsWeatherJuly 20, 2019Blistering heatwave scorching much of the U.S.Over 170 million people were left sweltering by a nationwide heat wave, sparking fears of power outages, transit delays, and health hazards. Up Next in newsHow to stay safe and prepare an emergency supply kitJuly 19, 2019Testing the dangers of hot cars on 'GMA' July 19, 2019Heatwave to scorch the country this weekend July 18, 2019