A 3ft-wide water pipe burst in Herne Hill at the junction of Half Moon Lane at around 5am today.
This has caused substantial flooding to the road and 36 properties in the area. We're really sorry to affected customers and we are working hard to put things right as quickly as possible.
Our main priority is to get people's lives and businesses back to normal.
Our loss adjusters are en route and will soon be talking to people to get the insurance process under way.
Customers should all still have water running through their taps as we have managed to re-route our network.
More top news
Pop star Adele is one of the hot favourites to headline next year's Glastonbury as tickets for the 2016 festival sold out in minutes.
The last British prisoner in Guantanamo Bay is worried he will die before US authorities release him.
Londoners can look forward to a sunny Sunday but be prepared for a change in the coming days.