The National Weather Service's heat advisory will run through Wednesday night, with the heat index expected to surpass 100 degrees for the second day in a row.

A dangerous heat wave continues to scorch a large part of the United States, with more than 130 million people under extreme heat watches and warnings from South Dakota to Florida as temperatures in some cities are expected to exceed 100 degrees and heat indexes — or “feels like” temperatures — could soar past 115°F.

An intense heat wave threatens millions of people across the Southeast with temperatures reaching 115 degrees through midweek.

Nashville's NWS issues a Heat Advisory warning of extreme temperatures and high humidity until Wednesday evening.

High heat and humidity could break records as a heat wave continues to scorch southern New England on Wednesday, but conditions could change drastically.

A heat advisory has been issued for the Lower Hudson Valley on Monday, July 28, as heat index levels are predicted to reach over 104 degrees.

Orlando heat wave triggers Heat Advisory with temperatures reaching mid to upper 90's and heat index up to 110°F.

New York City is bracing for the start of a potential heat wave beginning today, with city officials and weather experts urging residents to take precautions as temperatures rise.