Some 50 households had to stay in emergency accommodation overnight after a burst water main flooded homes in north London.
About 250 properties including two schools were affected after a 36-inch (91cm) water pipe fractured in Finsbury Park before 08:00 BST on Tuesday.
One man was rescued from a basement while others had to be led to safety.
Thames Water said a temporary fix had been put in place and all flood water had been pumped away.
The water main burst at the junction of Queens Drive and Princess Crescent causing an area measuring about 600m x 200m (1,900ft x 650ft) to be flooded to a depth of about 1m (3ft).
About 12 fire engines and 80 firefighters were deployed to help rescue people and pump water away, while postcode areas N1, N4, N5, N7 and N19 were left with no water or low water pressure.
Tanja Schnitzer, who lives in a basement flat on Queens Drive, said rooms in the property had filled up with water "within half an hour from floor to ceiling".
"It's devastating. We've pretty much lost everything," she said.
Water supplies for most properties in the area have been restored but Thames Water said air locks in the system meant some residents were still experiencing problems.
A spokesman for the firm said bottled water and plumbers were on standby in case of issues while engineers would finish fixing the mains during the day.
Woodberry Down Primary School remains shut but Parkwood Primary School has reopened.
Queens Drive, between Brownswood Road and Seven Sisters Road, has been closed to traffic.