Two water mains bursting in a suburb of a Cambridgeshire city within hours of each other cut supplies to more than 750 properties.
The first of the leaks happened in the early hours in the Stanground area of Peterborough.
Engineers restored supplies to most of the properties by early afternoon.
Anglian Water then confirmed a second pipe had burst in the area. It said residents would not have water turned back on until later in the night.