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Two days of torrential across the Pacific province of British Columbia touched off major flooding and shut rail routes operated by Canadian Pacific Rail and Canadian National Railway, Canada's two biggest rail companies.

"All rail service coming to and from the Port of Vancouver is halted because of flooding in the British Columbia interior," port spokesperson Matti Polychronis said.

At least one person was killed when a mudslide had swept cars off Highway 99 near Pemberton, some 100 miles (160 kilometers) to the northeast of Vancouver, killing an unspecified number of people.

Search and rescue crews were combing through the rubble for signs of survivors or additional casualties, officials said.