Lake Michigan Waves Slam Chicago Lakeshore Winds gusting up to 65 mph caused Lake Michigan waves to slam into the Chicago shoreline, sending water onto part of Lake Shore Drive. The waves slowed traffic and prompted the cancellation of a Halloween attraction. Parts of the scenic highway were flooded Friday, leading to some lane closures. Traffic was backed up for miles. The high waves prompted Navy Pier, one of Chicago's top tourist attractions, to close its eastern end. Navy Pier officials also canceled a haunted house that's located on a barge. Officials later announced the barge was taking on water and the attraction is closed permanently. The National Weather Service issued a lakeshore flood advisory to remain in effect until 4 a.m. Saturday. The warning forecasts winds of up to 50 mph and 23-foot waves.