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
Angela Millington's remains were discovered by ramblers near Southend in Essex in 2014.
Angela Kelly and her daughters, 12-year-old Shanti Harbourne, and Maya-Rose Kelly-Johnson, five, were last seen in Camberley, Surrey.
Voters in part of London have reportedly been turned away from polling booths due to "problems with the lists".