Record-breaking heat indices — a combination of temperatures and humidity to determine how heat really feels to the body — ...

The head index is expected to reach around 105 and an extreme heat warning is in effect until Monday, according to the ...

Cities across the eastern and central United States are bracing for more days of extreme temperatures as a unusual June heat ...

St. Louis, Chicago and Des Moines were among the cities that saw heat indexes hit triple digits on Saturday, with the East ...

Relief from the extreme heat facing the Chicago area remains several days away as advisories and warnings remain in effect.

Amid a summer heat wave in the Chicago area, some truly eye-popping heat index readings were recorded around the region.

Chicagoans can expect intense heat compounded by muggy humidity for the next several days. The National Weather Service has ...

The city's outdoor pools opened for the summer on Saturday, coinciding with the year's first major heat wave. Eager residents ...

A heat wave is moving in, with over 100 million people from the Midwest to the Northeast on alert for life-threatening heat ...

Scorching temperatures and high humidity are a bad combo, especially when that's the forecast for three days in a row, making ...

A Midwest heat dome is driving high temperatures and high humidity that will push the Chicago heat index into the triple ...

An Extreme Heat Watch goes into effect Saturday morning for Cook County and Chicago, when temperatures and humidity will ...