John Jongema's house is habitable again, but he is not getting rid of the fifth-wheel trailer he moved onto his farmland to ride out the rebuild anytime soon. "I'm keeping that trailer as a getaway," he said with a nervous chuckle. Jongema, who lives on a hobby farm on the Sumas Prairie about 90 kilometres east of Vancouver, is one of nearly 20,000 people in the southern part of British Columbia forced from their homes a year ago after record-breaking rains caused catastrophic flooding. The relentless rain came via an atmospheric river — an airborne stream of water vapour across the Pacific that originated in the subtropics. It triggered fatal mudslides, damaged critical highway infrastructure and called into question responsibility for flood mitigation in a province repeatedly pummeled by the impacts of climate change.