For the third time in a week, someone has drowned or nearly drowned on the Chain O’ Lakes. This time, a 70-year-old man was rescued after falling into the water.

Lake County Sheriff Detective Rebecca Loeb said that the Lake County Sheriff’s Marine Unit was called to Barnacle Bob’s Boat Rentals on Lake Marie near Antioch for a report of a unresponsive man.

Loeb said that a 70-year-old Lake Villa man was on the front of his Crestliner Fishing boat with two friends when a wave or wake hit the boat, causing it to sway and knock the man off the boat.

A person on another boat witnessed the man go into the water and rescued him and then started CPR.

The man, who has not been publicly identified, was transported by the Antioch Fire Department to St. Catherine’s Medical Center in Kenosha, Wisconsin where he remains in critical condition.

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The incident remains under investigation by the Lake County Sheriff’s Office.

In the two previous incidents on the Chain O’ Lakes, a 23-year-old Arlington Heights man died after drowning on Petite Lake, and a woman nearly drowned but was saved on Petite Lake.