Chicago Police keep an eye on boats that had come off of their moorings in the Monroe Street Harbor. Thursday, October 20, 2011. | Brian Jackson~Sun-Times

Chicago Police Marine units try to rescue boats that had come off of their moorings in the Monroe Street Harbor. Thursday, October 20, 2011. | Brian Jackson~Sun-Times

Chicago Police Marine unit Officers Aramon Thomas and Sgt. Ray Mazzola talk about the high waves that caused many boats to become untied from their mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

Mooring cans in the Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

A mooring can floats on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

Kirk Kessler takes pictures of some boats that become untied from their mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

High waves caused many boats to become untied from the mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

High waves caused many boats to become untied from the mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

High waves caused many boats to become untied from the mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

High waves caused many boats to become untied from the mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

A mooring can floats among the debris from damaged and sunk boats on the south wall of Monroe Street Harbor caused by high winds and waves. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

Chicago Police marine Unit Officers rescue a boat that had become untied from its mooring can and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

High waves caused many boats to become untied from the mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

Keith Pearson of Chicago Marine Towing talks about the high waves that caused many boats to become untied from the mooring cans and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times

Chicago Police marine Unit Officers rescue a boat that had become untied from its mooring can and ended up on the south wall of Monroe Street Harbor. Thursday, October 20, 2011 I Brian Jackson~Sun-Times