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A jumping device gone astray: whirled through the air by a tornado, this children's trampoline flies over car roofs in the streets of Toronto.
The storm swept through Canada's most populous province of Ontario, as seen here in Ottawa, and across the northern United States on Saturday.
At least ten people died and at least 44 others were injured.
The National Weather Service reported wind speeds of 130 to 220 kilometers per hour.
Hundreds of thousands were still without power on Sunday, and some roads were blocked by fallen poles and other debris.
Local weather experts said the storm was unusual for this time of year.
Warm air combined with strong winds over Lake Michigan would probably have led to the tornado.
