Croydon Council said its plan to use an underground footway in Purley to hold around 600,000 litres of water was approved after its "primary" pond at Purley Depot overflowed on Friday night.
This has not been an easy decision to take but it has become increasingly clear over the past few hours that we have no alternative if we are to protect people's homes and businesses from being flooded.
More top news
14-year-old Joshua Mould has learning difficulties and struggles to communicate.
David Haines' daughter tells ITV News families of IS victims will not get closure until there is a "bullet between the eyes" of Jihadi John.
The Essex boy will be racing for a new team - Manor - after the team formerly known as Marussia came out of administration.