GRAND FORKS, B. C.—Nearly 3,000 residents of Grand Forks, B.C. — representing roughly three-quarters of the small town’s population — remain under evacuation orders, according to the Regional District of Kootenay Boundary, as river forecasts predicted a “second crest” of water levels that could rise to close to levels seen Friday.

In a statement Sunday, the district’s emergency authorities warned that despite receding water levels, “the forecast calls for a second significant flooding event this week,” caused by a “second surge of water from melting snow.”

Several dykes “failed when overtopped by floodwaters,” the district said Saturday night, as crews raced to repair them before the next water-level rise. The B.C. River Forecast Centre called its predictions the “worst case scenario of conditions” for the region: warm weather, heavy rain and melting snowpack.

The flooding is Grand Forks’ worst since 1948.

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