From the dupe where the OP set the stage with location and details:
In June of this year, unprecedented flood waters hit the Canadian province of Alberta, doing serious damage. During the emergency, all 13,000 residents of the town of High River were ordered to evacuate and the perimeter was secured by the Royal Canadian Mounted Police. The perimeter was maintained even after many surrounding municipalities allowed people to move back into undamaged homes and begin repairs on damaged ones.
When High River residents returned home, they found that the RCMP had kicked in the doors of thousands of houses and confiscated hundreds of guns. Not a dime in compensation for doors or guns has ever been paid, although some attempt at a process to do this has since been proposed.
A reporter with the Toronto Sun put together a piece on what happened there, and maybe why.