Flood: Montréal QC, Jul 14 1987.

The city experienced severe thunderstorms and intense rainfall with 100 mm of rain in 1 hour. Major expressways were flooded with over three metres of water; in 30 minutes the subterranean Decarie Expressway was flooded with 3.6 metres of water; the sewer system was backed up, flooding approximately 40,000 homes and businesses; the subway system was closed; 2 dead: one from drowning in his car and the other was electrocuted. There was also a tornado caused by the severe thunderstorm which uprooted large trees and toppled hydro lines.