Millions of Americans are under heat alerts Monday as a heat wave brings triple-digit temperatures or heat indices to nearly half the continental United States, according to the National Weather Service—with the heat expected to impact the parts of the Southeast and the Mississippi river the hardest.

Tampa, Fla., recorded 100 degrees for the first time this weekend as extreme heat settles across much of the region.

Severe thunderstorms could continue into July 29, bringing havoc to morning commutes in Chicago, Milwaukee and Indianapolis.

A Heat Advisory is in effect through late Monday afternoon. WDHN Meteorologist Bryan Boggiano explains the latest, including when we can see some relief.

It's easy to lose your appetite when it's too hot out. But eating the right foods will help you beat the heat.

Much of July‘s seemingly intractable hot weather is being fueled by a “heat dome” that has been lingering in the eastern United States for about a month. These slow-moving, high-pressure systems are a weather phenomenon in which a section of high pressure over an area traps heat and humidity for an extended period of time.

A heat advisory is in effect until 10 p.m. for Metro Detroit as temperatures are expected to feel above 100 degrees, according to the National Weather Service. Monday's temperature, humidity and light wind are contributing to the conditions, according to Andrew Arnold, a meteorologist at the NWS Detroit office.

Another heat advisory is in effect for the Tampa Bay area on Monday, and there are some important things to know if you're spending any time outside.