The passenger ship SS Eastland capsizes while tied to a dock in the Chicago River. A total of 844 passengers and crew are killed in the largest loss of life disaster from a single shipwreck on the Great Lakes.

SS Eastland was a passenger ship based in Chicago and used for tours. On 24 July 1915, the ship capsized while tied to a dock in the Chicago River. In total, 844 passengers and crew were killed in what was the largest loss of life from a single shipwreck on the Great Lakes.

The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Superior, Michigan, Huron, Erie, and Ontario. The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect ultimately to the Atlantic Ocean via the Saint Lawrence River as their primary drainage outflow. The lakes are also connected to the Mississippi River basin through the Illinois Waterway.