"The area will broil today for a third consecutive day, and while temperatures may not hit 100, it will feel like it. A heat advisory is in effect through tonight in the far southern and western suburbs.
"An excessive heat watch is in effect from Wednesday morning through late Thursday night for the entire metropolitan area."
There are similar warnings in:
-- St. Louis.
Indeed, the National Weather Service's national map makes clear that the heat is on. The areas in purple are where the worst is expected in coming days.
The Weather Service has a considerable amount of information about the dangers of excessive heat posted here.