A crane which snapped at the top of a tower on Wellesley Road in Croydon over the weekend, is finally being removed.
Earlier efforts to do so were hampered by poor weather conditions.
Road closures have been put in place as a safety precaution and are likely to continue throughout today and tomorrow.
Affected roads include Station Road and St James Road.
The crane which was located at the construction site of a residential development called the Island, apparently snapped after heavy rain and strong winds last Saturday.
London Fire Brigade were called to the 20-storey building at approximately 4.45pm.
Six fire engines and over 50 firefighters were at the scene to support the crane engineers.
There were no reports of injuries, but residents in nearby homes were advised to stay indoors.
Work is being conducted on the Island, formerly known as the IYLO building, after a series of setbacks involving developers delayed construction.
The development, managed by Regency homes, is set to feature 183 apartments and 11 penthouses.
The development is expected to be completed in 2015.