Excerpts from nbcchicago.com:
Waukegan firefighters rescued 15 people from Lake Michigan Saturday in two separate incidents that occurred at the same time. The fire department received reports that 14 people had fallen off their boat and into the water about 6:30 p.m. As firefighters were arriving to that incident, someone in a private vessel rode up and told them that a man had fallen off a nearby jet ski and gone under the water.
The crews pulled a man out from under the water after an unknown amount of time. He was taken to a local hospital in critical condition.
After the jet skier was recovered, the firefighters focused on assisting the U.S. Coast Guard with removing the other 14 people, none of which were injured and the situation was concluded about 9:30 p.m.