Environment Canada has lifted tornado warnings after a twister crossed part of eastern Ontario and another was spotted in western Quebec.
The national weather agency issued a tornado warning for some of the area on both sides of the Ottawa River between Ottawa and Montreal on Sunday evening.
The warning came amid a small but powerful storm that included damaging winds, hail and intense rainfall.
The wind tore off roofs and uprooted trees in Ottawa's east end and debris closed several streets, including a major highway, all of which had reopened by about 9 p.m.
Ottawa police say there are no reports of injuries.
The city is still in a state of emergency over floods earlier this spring.
The capital region was hit by several tornadoes less than a year ago, which flattened neighbourhoods and did severe damage to the power grid.