It's going to be a hot July Fourth for much of the country

People cool off at the fountain in Millennium Park in Chicago as temperatures topped 90 degrees on Monday. Forecasts predict extreme heat this week across the Midwest and East Coast.

The National Weather Service has issued heat warnings and watches for much of the Midwest and East heading into the holiday weekend. In many places, the temperatures could shatter records.

(Image credit: Scott Olson)