heat index

Near-record warmth is expected for a second day in a row as the Chicago area continues to see dangerously hot temperatures, high humidity and more extreme heat.

Alicia Roman has the latest forecast.

With an excessive heat warning in effect for Chicago until 8 p.m. Wednesday, here’s what health experts say about staying safe and cool. Sandra Torres has more.

Near-record heat and dangerous humidity is expected for the Chicago area, with temperatures in the 90s but the heat index will make it feel much hotter.

Alicia Roman has the latest forecast.

The number tells you how the temperature outside really feels, and you can even calculate it yourself using a really long equation.

Rising temperatures due to climate change are already forcing Olympic organizers to rethink where events are held and how they are planned. In the future could we be watching the Summer Olympics during the winter? NBCLX storyteller Chase Cain takes a look at how climate change is already changing the Olympic experience and what may come next.