A 20-foot vessel with two adults and two kids aboard lost power and started drifting.
Some of the cargo is being off-loaded onto a nearby barge in an effort to free the ship.
The body of a 14-year-old boy was brought to shore early Tuesday morning.
Officials said the paddlers were unable to make their way in their inflatable boat because of the strong currents.
A wildfire has burned roughly one-third of an uninhabited island in Saginaw Bay.
The U.S. Coast Guard has rescued two men from a 17-foot boat that capsized in Saginaw Bay.