Water supplies have been restored to 90% of homes after major disruption despite more bursts overnight.

However, some people in “more elevated areas” are waking up on Sunday morning to a fourth day without water and will have to wait until the afternoon for supplies to be restored.

A burst pipe at a treatment plant in Dolgarrog, Conwy, is thought to have affected about 40,000 homes since Wednesday, closing some schools and businesses.

Welsh Water said it repaired a number of smaller leaks and bursts overnight as the system re-pressurised after emptying.

There were reports from residents on social media of a burst pipe on Pentywyn Hill in Deganwy, Llandudno, and also one in Fairways in Llandudno.

One woman in Fairways commented asking for sandbags at about 22:00 GMT on Saturday, saying house floors and garages were at risk of flooding.

Welsh Water said inspectors were out on the ground to help manage and mitigate any leaks so supplies can be maintained.

The damaged pipe in Dolgarrog was fixed on Friday afternoon, but the company warned it may take 48 hours for supplies to return to normal.

Speaking to BBC Radio Wales Breakfast on Saturday, the company’s chief executive, Peter Perry, said the incident was a “catastrophic failure” caused by ground movement, which could not have been foreseen or prevented.

Bottled water stations have been set up at four stations in Conwy, running in Park Eirias in Colwyn, Zip World Conwy, Llandudno West Shore car park and Bodlondeb site.

Welsh Water said on Sunday alternative water supplies would continue to be in place.