Media playback is unsupported on your device

Canada floods: Roof collides with bridge

21 June 2013 Last updated at 22:14 BST

Amateur footage has captured the moment a roof collided with a bridge as it was washed down stream in Bragg Creek, Alberta.

It came as authorities ordered the evacuation of downtown Calgary, Alberta's largest city, where flooding has left swathes of the city underwater.

Torrential rain and floodwaters have washed away roads and bridges and caused landslides elsewhere in the province.

Footage courtesy Tristan Zaba

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.