In November 2021, Abbotsford, B.C. was deluged with several days of heavy rain, flooding much of the low-lying valley around the city, wreaking havoc and causing millions of dollars in damage. With climate change, that will likely happen a lot more often in cities across Canada, including Calgary, Ottawa, and Montreal. So what should we do about this? Rivers are not naturally static bodies of water. A river can fluctuate in size and even shift direction depending on the climate, resulting in floods to the land next to it.