Six fire engines and around 40 firefighters were called to a flooding on Bickley Road in Bromley.
Around one hundred metres of roadway was flooded to a depth of around three feet after a water main burst at street level. There were no reports of any injuries.
A London Fire Brigade spokesperson said: “Road closures were in place after a 250-metre water main burst due to heavy rainfall.
“Crews used sand bags and temporary, freestanding flood barriers which slot together to control fast flowing water in the area and prevent flood water spreading into nearby properties.
“If you experience flooding as the uncertain weather continues, we would encourage you to follow our safety tips.”
The Brigade was called at 1749 and the incident was over for firefighters by 2133. Fire crews from Bromley, Sidcup, Orpington, Beckenham and Lee Green fire stations attended the scene along with the local water authority.