No relief from the heat as many US cities will see record overnight temperatures

The U.S. is experiencing record-breaking overnight temperatures this week, with over 90 records expected to be tied or broken. Health experts warn that high nighttime temperatures pose severe risks, particularly for vulnerable populations, as the body cannot cool down sufficiently. Cities across the South, Midwest, and Northeast are forecasted to remain above 70-80°F overnight, exacerbating heat-related health dangers.