A possibly record-breaking heat wave is striking Illinois and the eastern third of the U.S.

Chances for thunderstorms could cool off the area in time for July 4th, but a lack of storms could prolong the hot stretch.

As dangerously high temperatures push heat indices into the hundreds, extreme heat warning issued through 10 p.m. Wednesday.

Another round of dangerous summer heat is settling over Chicago only three weeks after the last major warmup, and parts of ...

Chicago is in the middle of its second heat wave in the last three weeks, but if you think it's been hot so far this summer, ...

All of the Chicago area and Northwest Indiana have been upgraded to an Extreme Heat Warning through Thursday amid a Midwestern heat wave.

Temperatures will be scorching this week across Illinois, reaching heat indices as high as 110 degrees in some areas, ...

A heat wave that set records in the West is now bringing scorching temperatures and high humidity to the Midwest, and is ...

An Extreme Heat Warning is in effect for Cook County, and a Heat Advisory for the rest of the Chicago area, through at least Wednesday night.

An extreme heat warning remained in effect through early Friday, with temperatures expected to stay in the 90s throughout the week, according to the National Weather Service.

Heat indexes continue to sit in the triple digits across Illinois this weak as an excruciating heat wave makes its way through the Midwest. But will temperatures dip in time for Fourth of July ...