CFD said a paddleboarder was rescued over a mile off the shore near Montrose Harbor around 11 a.m.
The condition of the person was not immediately available.
This comes as crews have not yet found a man, who reportedly fell off a boat on Saturday afternoon near the enclosed boating area, also known as the "Playpen," close to downtown Chicago.
On Sunday, a 53-year-old woman was found dead after a boat capsized near Winnetka.
A teen boy also died Monday, after falling off a raft near Montrose Beach on Chicago's North Side.
Later Monday, a couple was rescued by a passerby after struggling to swim near Montrose Harbor.
This is a developing story check back for updates.