CN Tower EdgeWalk, Toronto, Ontario, Canada

A freezing rain storm on March 2, 2007 resulted in a layer of ice several centimetres thick forming on the side of the tower and other downtown buildings. The sun thawed the ice, and winds of up to 90 km/h (56 mph) blew some of it away from the structure. There were fears that cars and windows of nearby buildings would be smashed by large chunks of ice. In response, police closed some streets surrounding the tower. During morning rush hour on March 5, police expanded the area of closed streets to include the Gardiner Expressway 310 metres (1,017 ft) away from the tower, as increased winds blew the ice farther away, as far north as King Street, 490 metres (1,608 ft) away, where a taxicab window was shattered.
On March 6, the Gardiner Expressway was reopened after winds died down.