Around 30 residents have been evacuated from their homes in north London after a water main burst, leaving roads under 44cm (17in) of water.
Seventy firefighters were dispatched by London Fire Brigade to the area around Canonbury Street in Islington just after 10pm on Sunday.
People have been urged to avoid the area including Essex Road, Elmore Street, Halliford Street and Ecclesbourne Road – and warned against driving through floodwater.
Fire crews used flood barriers and sandbags to divert floodwater away from homes as they warned disruption was likely to continue into Monday afternoon.
Islington council also warned at 9am on Monday that Canonbury Street was closed from Essex Road up to Arran Walk.
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A Thames Water spokesperson said: “We have now managed to stop the flow of water and ensure that the site is safe. We have also been able to move parked cars which were over another critical water main.
“We have a specialist team on site for those impacted by the incident, at Cedar Place on Essex Road, and are supporting customers who have been affected.
“To keep the public and our team safe, we’ve arranged equipment to help manage the traffic while we work in the road. We are sorry for the impact this may have on traffic in the area.”