More than 100 years ago, a lake outside what is now the Abbotsford, B.C., area was drained to create lucrative farmland. Many say that decision is a big contributor to the devastating flooding.

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The National is CBC’s flagship nightly news program, featuring the day’s top stories with in-depth and original journalism, with hosts Adrienne Arsenault and Andrew Chang in Toronto, Ian Hanomansing in Vancouver and the CBC’s chief political correspondent, Rosemary Barton in Ottawa.