A crew from the Coast Guard air station in Detroit was dispatched to the scene.
People in tubes and rafts entered the U.S.-Canada border river Sunday at Lighthouse Beach in Port Huron, about 55 miles northeast of Detroit.
The U.S. Coast Guard said six people were on a boat that was hit by another boat around 6:45 p.m. in the south channel near Harsens Island.
The annual Jobbie Nooner festivities created lots of extra work for the Coast Guard.
A woman on a boat that capsized miles from Chicago’s shoreline died after being pulled from Lake Michigan.
Coast Guard Sector Sault Ste. Marie ran the 160-day operation which included more than 5,000 hours of ice breaking for convoys.
Five U.S. and three Canadian vessels worked to clear paths on Lake Erie, Lake Ontario, the St. Lawrence Seaway, the Detroit and St. Clair rivers, and southern Lake Huron.
The 140-foot cutter Neah Bay had planned to begin work Saturday from Gravelly Shoal to the entrance of the Saginaw River.
The Coast Guard says it got word early Saturday of a man adrift on an ice floe off Sterling State Park in Monroe County’s Frenchtown Township.
A dog missing since last month that was rescued several miles from land on the ice of Lake St. Clair by a U.S. Coast Guard crew has been reunited with his owners.