Provincial police say eight homes in a community about 25 kilometres south of Owen Sound, have been evacuated due to the threat of flooding.
They say properties in low lying areas around McCullough Lake in Williamsford are at risk.
Police say McCullough Lake Drive is under water and residents are being asked to evacuate the area as a safety precaution.
The Williamsford Community Centre is serving as an evacuation centre for those affected, and OPP say no injuries have been reported.
Highway 6 is closed between Chatsworth Sideroad 5 and Chatsworth Road 24, and several secondary roads in the area are closed due to high water levels.
The mayor of Chatsworth has declared a state of emergency for the Township of Chatsworth.