Evanston and Chicago beaches are closed through Tuesday night to swimming.
Strong rip currents are expected along the Illinois Lake Michigan shores. The strong rip currents have been reported Tuesday, as well as seven foot high waves.
The National Weather Service said waves are expected to be strongest near the lakefront thanks to a tight pressure gradient and the unstable conditions over the lake.
Rip currents are powerful channels of water flowing quickly away from shore, which occur most often at low spots or breaks in sandbars. Rip currents can sweep you from shore into deeper water. Structural currents form along piers and breakwalls where long shore currents and wave action flow into the structure. These structural currents can sweep you from the shore along the pier structure.