How a U.S. river swelled catastrophic floods in B.C. — and why little can be done to stop it happening again
A new trans-boundary agreement highlights the complexity of managing waters that flow across international borders — and the limited jurisdiction of Canadian officials hoping to mitigate another disaster at home.
![How a U.S. river swelled catastrophic floods in B.C. — and why little can be done to stop it happening again](https://i.cbc.ca/1.6256603.1699999661!/cumulusImage/httpImage/image.jpg_gen/derivatives/16x9_620/flooding-chilliwack.jpg)
![Volunteers from the community fill sandbags to jet boats that will be taken to farms in the Sumas Prairie flood zone in Yarrow, British Columbia on Friday, November 19, 2021. Two men load sandbags off a boat while standing in knee deep water](https://i.cbc.ca/1.6256603.1699999661!/cumulusImage/httpImage/image.jpg_gen/derivatives/16x9_620/flooding-chilliwack.jpg)
A new trans-boundary agreement highlights the complexity of managing waters that flow across international borders — and the limited jurisdiction of Canadian officials hoping to mitigate another disaster at home.