 Swells from Isabel produced moderate surf along the Atlantic coast of Nova Scotia , particularly in the Gulf of Maine . Isabel also produced rough surf in Lake Ontario , with waves reaching 4 m ( 13 ft ) along the western portion . At Hamilton , the waves surpassed seawalls and produced spray onto coastal streets . Rainfall peaked at 59 mm ( 2 @.@ 3 in ) , which caused minor flooding and led to one traffic fatality . About 27 @,@ 000 people lost power , mostly near Toronto . The strong pressure gradient between Isabel and a high pressure system over eastern Canada produced strong easterly winds across lakes Ontario and Erie . A buoy in Lake Ontario reported a peak gust of 78 km / h ( 49 mph ) , and gusts reached as strong as 81 km / h ( 51 mph ) at Port Colborne , Ontario . 
