Residents in the Southeast U.S. are no strangers to heat in the summertime, but this week's sweltering hot weather set at least one record and has forecasters urging residents to limit time outside on Tuesday if possible — and stay hydrated.

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

Dangerous heat continues across the U.S. as millions face feels-like temperature reaching into the 90s and 100s from the Southeast to the Midwest. St. Louis, Missouri, which has been under extreme heat all week,