Dangerous heatwave to bring record temperatures across eastern US

National Weather Service warns heat index could reach 115F as extreme heat grips midwest, Ohio valley and east coast Sign up for the Breaking News US newsletter email A “prolonged, dangerous heatwave” is expected to intensify across parts of the central and eastern United States over the next few days and into the holiday weekend, bringing record-breaking temperatures, humidity, and dangerous conditions to millions of Americans. The National Weather Service (NWS) warned on Thursday that temper