Strong rip currents and life-threatening waves are expected along Lake Michigan Thursday.
The National Weather Service warned that people visiting beaches in the Chicago area should stay out of the water.
Wave heights between 3 and 6 feet are possible amid dangerous swimming conditions with powerful channels of water flowing quickly away from the shore.
The alert warned that exposed beaches are more likely to experience the most significant wave and current impacts.
Both Foster Beach and Calumet Beach were under a swim advisory Thursday while Fargo Beach had a swim ban, according to the Chicago Park District.
For more information on Chicago beaches or to see if your beach has an alert click here.