The eastern suburbs of quake-hit Christchurch may face power cuts this winter.
Four large cables that carry power to the city's northeast were damaged beyond repair in the earthquake on 22 February, while dozens of smaller cables suffered multiple faults.
To repair and replace those damaged cables, lines company Orion says it may have to cut power to the eastern suburbs three or four times for up to five hours each time.
Residents in more severely damaged streets may experience more frequent cuts.
Orion advises the public in those areas to continue to use heaters to stay warm, but to turn off all other unnecessary appliances.
Customers elsewhere in the city can use electricity as normal, as their usage will not put extra pressure on the network.