Thousands of homes and properties were left with little or no water as a water main burst at Grange Park.
United Utilities confirmed 16,000 people had been affected when a 24” mains pipe burst under a field close to Bathurst Avenue on Thursday morning.
Christ the King Catholic Primary School, on Bathurst Avenue, was forced to send children home and close for the day at 11am.
Headteacher Sarah Smith said: “We had to take a decision on the basis we can’t flush our toilets. We need to know teachers and children are safe.
“United Utilities has been excellent in keeping us informed.
“Parents have been informed continually this morning.”
Nearby Boundary Primary School, on Dinmore Avenue, is unaffected by the water problems and remains open.
And the City Learning Centre, also on Bathurst Avenue, is unaffected and able to remain open.
Callers to The Gazette said Mythop Road, Hammerton Place and Bathurst Avenue are among the roads affected.
One resident of Newton Drive said their water had been off since 4.30am.
But United Utilities said its first report of water being off didn’t come in until 7am.
John Martin, a spokesman for United Utilities, said: “Originally a large number of people were without water or poor pressure.
“We quickly managed to rezone supplies.
“We do have water tankers pumping water into the system to maintain a good level of pressure and to bring water in from other mains in the area.
“By just after 10am we managed to restore water to everyone but there would have been pockets of people in one area, Normoss, that would have had poor pressure.
“We don’t yet have an estimated time for the full repair but hopefully it will be later today.
“We are very sorry if mornings were disrupted.”