More than 160 million Americans are under the highest level of extreme heat alerts during a wave of above-average temperatures.

An "extremely dangerous heat wave" is continuing to scorch a huge area of the eastern United States June 23, affecting tens of millions of people.

New York’s Central Park tied a record high of 96 degrees for the date Monday, which was set in 1888. In neighboring New Jersey, 16 people were sent to the emergency room following a sweltering set of graduations.