One person was taken to a Windsor hospital in critical condition after being pulled out of the Detroit River.
Emergency crews responded to a 911 call Thursday afternoon following a report there were two people in the frigid water.
The U.S. Coast Guard from Detroit dispatched a boat and crew, along with a helicopter.
Crews located a 53 year old man, but haven't confirmed if there was a second person in the water.
Authorities tell CTV Windsor this is the seventh water rescue in one week.