A number of people are in hospital, some of them badly injured after a powerful tornado ripped though the National Capital Region The twister smashed dozens of homes in the Ottawa area neighbourhood of Dunrobin and in Gatineau, Quebec The property damage is vast as trees and power lines were torn down over a wide area Electricity was knocked out for tens of thousands of hydro customers Hydro Ottawa workers have been working through the night to restore power to thousands of customers left in the dark