A Thames Water spokesman says the water is not sewage.
They say it is the result of a burst water main, which had mixed with silt and mud.
Engineers are on site working to manage the problem.
More top news
The Metropolitan Police has responded to allegations that they refused to enter the water to rescue a teenager who was drowning
Kids Company founder Camila Batmanghelidjh has responded to allegations of child abuse and sexual offences against the charity.
New research suggests that Londoners often pay twice the price for their houses compared to those who live a short commute out of the city