Catastrophic floods that swamped much of southern British Columbia last fall were at least twice as likely because of climate change, suggests new research from Environment Canada. The study, now undergoing peer review, concludes that the likelihood of similar events in the future will only increase as global warming continues to upend normal weather patterns. "We do find substantial ongoing increases in the probability of these kinds of events," said Nathan Gillett, an atmospheric physicist and manager of the Canadian Centre for Climate Modelling and Analysis.