The Lord's Cricket Ground has been evacuated with non-essential staff leaving the site after strong winds hit the building in north-west London.
Two people were treated for minor injuries after the incident.
Two motorists were treated at the scene for minor injuries when sections of the Tavern Stand roof were blown on to parked cars in St John's Wood Road.
Four men were also hurt when winds brought down a wooden hoarding close to Euston station.
One man received a shoulder injury and the other suffered a leg injury.
Neither injury is described as life-threatening.
Elsewhere, Kings Cross station was closed because of high winds affecting First Capital Connect, GNER and Hull Trains.
And London Bridge train and bus station was also closed because of roof damage.
Police also closed a bridge over the River Thames following fears for "pedestrian safety" because of the stormy weather.
The decision to close the Millennium Bridge was taken at around 1200 GMT.
Police were keen to stress the decision was not based on "structural reasons" but rather the risk of pedestrians being blown into the river.
The bridge - also known as the "Wobbly bridge" - will be closed indefinitely.
The 320-metre long structure crosses the Thames between St Paul's Cathedral and the Tate Modern.
A City of London police spokesman said: "Police took the decision to close the bridge because of pedestrian safety. It's just a precaution."