OTTAWA—Search teams using dogs started looking for people whose cars may have been buried in landslides across the Canadian province of British Columbia on Tuesday, as the country’s two biggest railways reported serious damage to their networks. The storms, which started on Sunday, wrecked roads in the Pacific province, forced an oil pipeline to close and limited land access to Vancouver, the city with Canada’s largest port. Railway lines operated by Canadian Pacific Rail and Canadian National Railway were both out of service at the towns of Hope and Chilliwack in the lower mainland Fraser Valley region to the east of Vancouver, CP said in a notice to customers. Some areas received 8 inches (200 mm) of rain on Sunday, the amount that usually falls in a month. Rescuers equipped with diggers and dogs will start dismantling large mounds of debris that have choked highways. “If a bit of machinery …