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Why is B.C. facing the prospect of a flood disaster again?
Heavy rain up to 145 mm combined with Nooksack River overflow threatens flood-prone areas; about 30 to 40 atmospheric rivers affect coastal B.C. annually, Environment Canada says.
- On Dec. 11, 2025, British Columbia's Lower Mainland faced flooding, severed highways and evacuations after an atmospheric river dumped up to 145 millimetres in parts of the Fraser Valley.
- Environment Canada notes about 30 to 40 atmospheric rivers hit coastal British Columbia each year, transporting moisture and earning the nickname `pineapple express`.
- An extensive dike system and the Barrowtown pump station in Abbotsford protect Sumas Prairie, pumping water into the Fraser River via Sumas Canal; emergency officials said outflows from the Nooksack on Wednesday rivalled those of 2021, while provincial government upgrades remain incomplete.
- Washington state declared a state of emergency after the Nooksack River broke its banks on Wednesday, and when it overflows, its waters can spread into British Columbia.
- Four years ago the Nooksack River flooded Sumas Prairie, Abbotsford, causing billions in damage and devastating livestock, while strong, repeated atmospheric rivers drive past major floods.
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Why is B.C. facing the prospect of a flood disaster again?
British Columbia's Lower Mainland is facing flooding, severed highways and evacuations due to the double impact of an atmospheric river and cross-border water flows. Here's an explainer of why the area has been repeatedly hit by similar disasters. WHAT IS AN ATMOSPHERIC RIVER? A long, thin, horizont...
·Kelowna, Canada
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Total News Sources23
Leaning Left15Leaning Right0Center3Last UpdatedBias Distribution83% Left
Bias Distribution
- 83% of the sources lean Left
83% Left
L 83%
C 17%
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