All evening classes at the downtown campus of McGill University are cancelled on Monday due to a huge flood that originated near the McTavish Reservoir. City officials told The Canadian Press that a water main broke at a construction site near downtown causing the slope of Mount Royal to turn into a stream. Parts of Rene-Levesque Boulevard and Sherbrooke Street are closed and the area is dangerous due to fast-moving water and ice. Observers have posted many photos on Twitter and YouTube user Sly005 posted this video that shows a person swept down the street: