A burst pipe in Hackney Marshes has left thousands of homes and businesses across nine east London postcodes without water.
Engineers have been working through the night “while we draft in as many resources as we can to tackle this repair and get things back to normal”, the utility company said in a statement.
“We’re planning the repair of this 42-inch-diameter pipe, while continuing to pump water into our network using a fleet of tankers,” it added.
Thames Water were trying to clear “the huge amount of water that’s flooded a heavily wooded area of Hackney Marshes at Wick Woodland, where we’ve been working hard to make the area safe and block off flooded footpaths.”
“We’re really sorry if this has affected your water, particularly at this difficult time,” the utility said.
“We absolutely realise how inconvenient and worrying this is and will be doing all we can to restore supplies as quickly as possible.”
Local supply of water was expected to be affected over the next 24 hours, with Thames Water planning to open sites later on Wednesday morning where bottled water will be distributed.
Due to a high volume of calls, Thames Water said it was “prioritising assistance for vulnerable customers and hospitals”.
Affected postcodes include E6, E7, E10, E11, E12, E13, E15, E16 and E20.