The heat index considers the actual temperature and amount of moisture in the air using the dew point or relative humidity.

A heat advisory has been issued for Miami-Dade and Broward counties for Monday and will be in effect noon to 6 p.m. South Florida also was under a heat advisory on Friday. Although the weekend was scorching hot in the region, the National Weather Service in Miami didn’t issue heat advisories for Saturday and Sunday.

Michigan is heating up this week. Two southwest counties are already under a heat advisory because of dangerous heat index values.

Heat and oppressive humidity will greatly impact your daily routine this week, and First Alert Weather Impact Days have been issued through Thursday due to the excessive heat.

EDT the National Weather Service released a heat advisory valid for Wednesday between 2 p.m. EDT and 8 p.m. EDT for Cass and Berrien counties.

Dangerous heat and oppressive humidity will remain the main story as we continue through the workweek, though a few isolated showers cannot be ruled out.

The National Weather Service released a heat advisory at 10:42 p.m. on Monday in effect until Tuesday at 9 p.m. for Blount, Etowah, Calhoun, Cherokee, Jefferson, Shelby, St. Clair, Talladega, Chilton,

The National Weather Service office in Mobile, Alabama, issued a heat advisory in Escambia, Santa Rosa and Okaloosa counties between 10 a.m. and 7 p.m. Monday. Heat index values are forecast to reach as high as 109℉ in portions of south central and southwest Alabama, northwest Florida and southeast Mississippi.