The powerful band of thunderstorms sweeping across the region this morning is causing headaches for motorists, pedestrians - and Hydro Quebec.
As of 9 a.m., about 6,400 Hydro customers on the Island were without electricity, including those in parts of Dorval, Lachine, Lasalle and the City of Montreal.
The area off the western tip of the Island was also hard hit by power failures. 25,000 homes and businesses in Vaudreuil-Soulanges are without electricity.
A lightning alert caused flight delays at Trudeau Airport.