Ten fire engines and around 70 firefighters dealt with flooding on Meadowcourt Road in Blackheath and the Eltham Road area.
Crews diverted flood water and assisted residents to safety after a water main ruptured, flooding an area of around 600m x 200m to a depth of around 50cm. Six properties were flooded and the fire station was also affected by flood water. There were no reports of any injuries.
There are significant road closures still in place and buses are being diverted. People are advised to avoid the area.
The Brigade was called at 0438 and the incident was over for firefighters by 1006. Fire crews from Lewisham, Eltham, East Greenwich and surrounding fire stations attended the scene.