A swift-moving storm carrying high winds and pelting rain knocked out windows at Chicago’s 110-story Willis Tower.
Police roped off areas around the imposing black building long known as the Sears Tower.
Chicago Battalion Chief Michael Gubricky said windows were blown out in a 29th floor air conditioning mechanical room and a 25th-floor unoccupied office.
Glass was on the pavement, but no injuries were immediately reported near the tower. Authorities said a woman did receive minor injuries from flying glass at the downtown Daley Centre blocks away.
The National Weather Service said winds in excess of 70 mph were recorded.