It’s hot and getting hotter for workers and everyone else outdoors as the first significant heat wave of the year makes its way eastward across the United States. More than 70 million people were under extreme heat alerts Monday.
What's more, the heat will move in and sit. Excessive humidity will make it feel even more oppressive. “The duration of this heat wave is notable and potentially the longest experienced in decades for some locations,” the National Weather Service said over the weekend.
