Canada's two primary freight rail operators, Canadian National Railway (CN) and Canadian Pacific Kansas City (CPKC), are facing simultaneous labor stoppages that threaten to inflict billions of dollars in economic damage. Negotiations between the Teamsters union, representing approximately 10,000 workers, and the companies have reached an impasse, leading to potential lockouts set to begin on August 22. This situation arises from synchronized contract negotiations initiated in 2022, which expired at the end of 2023. Both rail operators have already begun to halt certain shipments, including hazardous materials and refrigerated products, in anticipation of disruptions. Analysts warn that prolonged stoppages could lead to significant supply chain issues, impacting a wide range of goods, especially with the upcoming harvest season. Despite the potential for work stoppages, operations on the U.S. and Mexican networks are expected to continue unaffected.