Lake seiches can occur very quickly: on July 13, 1995, a large seiche on Lake Superior caused the water level to fall and then rise again by three feet (one metre) within fifteen minutes, leaving some boats hanging from the docks on their mooring lines when the water retreated. The same storm system that caused the 1995 seiche on Lake Superior produced a similar effect in Lake Huron, in which the water level at Port Huron changed by over two hours. On Lake Michigan, eight fishermen were swept away from piers at Montrose and North Avenue Beaches and drowned when a seiche hit the Chicago waterfront on June 26, 1954.