The port of Vancouver, Canada's largest, said on Tuesday that all rail access had been cut by floods and landslides farther east that killed at least one person and left two others missing.
Two days of torrential rain 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 swept cars off Highway 99 near Pemberton, some 100 miles (160 kilometers) to the northeast of Vancouver.
Search and rescue crews were combing through the rubble for signs of survivors or additional casualties, officials said.
Vancouver's port moves C$550 million ($440 million) worth of cargo each day, ranging from automobiles and finished goods to essential commodities.
The floods temporarily shut down much of the movement of wheat and canola from Canada, one of the world's biggest grain exporters, during a busy time for trains to haul grain to the port following the harvest.
This year drought has sharply reduced the size of Canada's crops, meaning a rail disruption of a few days may not create a significant backlog, a grain industry source told Reuters.
Del Dosdall, senior export manager at grain handler Parrish & Heimbecker, said he expected some rail service could be restored by the weekend. Another industry source said he expected the shutdown to last weeks.
Floods have also hampered pipelines. Enbridge shut a segment of a British Columbia natural gas pipeline as a precaution.
The storms also forced the closure of the Trans Mountain pipeline, which carries up to 300,000 barrels per day of crude oil from Alberta to the Pacific Coast.
Copper and coal miner Teck Resources Limited said the floods had disrupted movement of its commodities to its export terminals, while potash exporter Canpotex said it was looking for alternatives to move the crop nutrient overseas.
Directly to the south of British Columbia, in Washington state, heavy rains forced evacuations and cut off electricity for more than 150,000 households on Monday. The U.S. National Weather Service on Tuesday issued a flash flood warning in Mount Vernon, Washington, "due to the potential for a levee failure."
Some areas of British Columbia received 20 centimeters (8 inches) of rain on Sunday, the amount that usually falls in a month.
Authorities in Merritt, some 200 km (120 miles) northeast of Vancouver, ordered all 8,000 citizens to leave on Monday as river waters rose quickly, but some were still trapped in their homes on Tuesday, said city spokesman Greg Lowis.
Snow blanketed the town on Tuesday and some cars could be seen floating in the flood waters still up to 1.22 meters (4 feet) high. The towns of Chilliwack and Abbotsford ordered partial evacuations.
Rescuers equipped with diggers and body-sniffing dogs started dismantling large mounds of debris that have choked highways.
The landslides and floods come less than six months after wildfires gutted an entire town, as temperatures in the province soared during a record-breaking heat dome.
