Lake Ontario flows out to the Atlantic Ocean through the Saint Lawrence River, regulated by the Moses-Saunders dam in Cornwall, Ontario. The outflows are decided by the International Lake Ontario–St. Lawrence River Board.
The board on Friday increased outflows, May 19 2019 the lake was at 248.6 feet, compared with the historical average of 246.2 feet for this time of year. It reached 248.9 feet in 2017, when homes and beaches were damaged by flooding.
Montreal Can have floodingMoses-Saunders dam releases water.