A line of severe thunderstorms rolls through Ontario, Canada, spawns over 18 tornadoes in one day which has been declared to be the largest tornado outbreak in Canadian history, at least four F-2 tornadoes were confirmed, including one touching down in the town of Durham, Ontario, northwest of Toronto where at least one person was killed, and the other in a Toronto suburb of Vaughan, Ontario where over 600 homes were damaged or destroyed.
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