Tower Bridge Road was brought to a standstill during Wednesday evening's rush hour when a fire broke out on the roof of a block of flats at the corner of Druid Street.
Firefighters from Dockhead, Old Kent Road, Dowgate, Whitechapel, Soho, Lambeth and Greenwich were called to the scene.
The London Fire Brigade said that the roof terrace and decking of the flats at the corner of Tower Bridge Road and Druid Street were damaged in the blaze.
Smoke from the fire was visible from some distance away.
For the latest local news and events direct to your inbox every Monday, you need our weekly email newsletter SE1 Direct.