The Extreme Heat Watch will be upgraded to a Heat Advisory.
We are expecting heat index readings greater than 105 degrees.
The Heat Advisory will go into effect Wednesday 10 a.m. and will expire on Thursday at 10 p.m., the National Weather Service said.
ABC7 meteorologist called for an AccuWeather Alert for Wednesday and Thursday as dangerously hot conditions are expected.
The heat index is expected to reach from100 to 110 degrees.
It will also be very humid.
Isolated thunderstorms could be possible on both days.
How to stay cool in Chicago area amid rising temperatures this summer: LIST
The best way to avoid heat related illness is to limit your time outdoors, stay out of the sun, and drinks lots of water and fluids to remain hydrated. Also check on your relatives and neighbors, especially if they are elderly.
If you can't stay inside or your home is not sufficiently cooled, there are resources around Chicago to help.