High nighttime temperatures can do more than just disrupt your sleep, experts say.
By Kiley Price
Much of the United States is baking amid an unusually severe June heat wave, with more than 150 million people under some sort of heat advisory. The unrelenting heat wave started in the Mountain West over the weekend and has since descended upon the Midwestern and Eastern U.S., where high humidity is making temperatures topping 100 degrees Fahrenheit feel even hotter.