Around 300 homes are without water in part of Stoke-on-Trent this morning.
Supplier Severn Trent says it's worked overnight to repair a burst pipe in the Barlaston area.
The company has apologised and says it has this morning started delivering bottled water to those homes affected.
A spokesman for Severn Trent said: "We'd just like to say how sorry we are that it's taking this long to get everything back to normal but we're doing everything we can to get water supplies back as quickly as possible.
"We've got teams on the ground looking at fixing the pipe that burst last night but it's not been as straightforward as we'd hoped. In the meantime we've been using water tankers injecting straight into our network to get some customers back on, and we've been moving water around our pipes in a different way to normal to get other customers back on overnight.
"As a result of that, some customers might be experiencing some low pressure, for which we'd like to apologise, but this will pass as soon as we get our system back to how it works normally.
"While we carry out our work, we'll have to close two roads in the area - Wedgwood Drive and Longton Road - and we also need to put traffic lights on Hartwell Lane to ensure that our teams can work safely.
"Our teams have been in close contact with vulnerable customers in the area and we'll also be hand delivering bottled water to their doors to make sure that they've got everything they need while we complete the repair. We'd just like to say sorry again to everyone affected as this has taken much longer than we thought it would and we know that our road closures will affect the morning commute, but everyone we believe has no water will get bottled water delivered straight to them and won't have to do anything else."
Our teams have been working through the night to get everyone back on in Barlaston pic.twitter.com/nmOTrspUmS— Severn Trent (@stwater) 9 November 2017