The U.S. Coast Guard pulled four people from Lake Michigan on Sunday, after their sailboat capsized off the shore of north suburban Highland Park.
Rescuers pulled two men and two children from the water shortly after noon, the Tribune reported.
All four were wearing life jackets, but they all suffered some degree of hypothermia. The water temperature was around 58 degrees.
The Coast Guardsmen brought the two men -- a 43 year-old from Deerfield and a 42-year-old from Highland Park -- and the children, a 13-year-old boy and an 11-year-old girl, both of Highland Park, aboard the RB-S and transported them to Highland Park, where emergency medical technicians were waiting.
The Coast Guard attributed the quick rescue to the fact that the victims used their VHF marine radio, rather than their cell phones, to call for help.
The Coast Guard encourages all mariners to invest in a VHF-FM marine-band radio as their primary means of communication on the water.