(LEXINGTON) -- A 48-year old Lexington man was pulled from Lake Huron at the foot of Lake Street in the Village of Lexington Thursday afternoon after he was found floating face down in the water. Sanilac County Sheriff's deputies were sent to the location shortly after 4 p.m. Officials say the victim, Jeffrey McClelland, has a history of medical problems. The man was out cooling off on a float in about two feet of water when nearby swimmers noticed him. They pulled him to shore and C.P.R. was started. McClelland was transported to Port Huron Hospital where he remains in critical condition. Deputies were assisted by Lexington Fire and Rescue and Croswell EMS. Lt. Washkevich says it's still unclear whether a medical event occurred before McClelland overturned in the water. The incident remains under investigation.