Environment Canada has confirmed a tornado touched down during fierce thunderstorms that swept through Ontario's Muskoka region Friday evening.
The agency says it sent an expert to Huntsville on Saturday on the strength of eyewitness reports of a twister and images of damage to trees and buildings.
It's too early to know how strong the tornado was, but it damaged several structures.
The thunderstorms downed trees and powerlines.
They also knocked out power to roughly 13,000 Hydro One customers in the area Friday night and the utility says about 4,000 remained without power as of early Saturday afternoon.
Karin Terziano, deputy mayor of Huntsville said the storms also ripped shingles off roofs and even flattened a shed.