Millions across the central and eastern United States are bracing for a prolonged and dangerous heatwave this week, with temperatures set to soar ahead of the Fourth of July holiday and high humidity making conditions feel even more oppressive.
More than 130 million Americans in southern and Great Plains states were under moderate to severe heat risk over the weekend, a figure expected to grow as the week progresses and temperatures intensify across regions like the lower Great Lakes, mid-Atlantic, and the Mississippi and Ohio River valleys.
