
A strike has shut down all shipping on the St. Lawrence Seaway, interrupting exports of grain and other goods from Canada and the United States via the Great Lakes to the rest of the world.
Around 360 workers in Ontario and Quebec with Unifor, Canada’s largest private-sector union, walked out early Sunday in a dispute over wages with the St. Lawrence Seaway Management Corp. The strike has shut down 13 locks between Lake Erie and Montreal, bottling up ships in the Great Lakes and preventing more ships from coming in.