In Donetsk Region, a number of important infrastructure facilities damaged by militant shelling resumed work on 26 December, ATO HQ reported on Facebook.
The head of the Joint center for control and coordination (JCCC) of the ceasefire and stabilization along the contact line Maj Gen Anatoliy Petrenko said that among the important elements of local infrastructure that could face blackout were Donetsk filtering station, which provides water to the cities of Avdiyivka and Yasynuvata.
Avdiyivka coke plant was almost brought to a standstill. Also, power mains to substations supplying potable water to Toretsk, Horlivka, Donetsk and Mariupol have been damaged, which could have left half a million civilians without water.
"Ukrainian JCCC officers took prompt measures to start repair works," Petrenko said in a statement.
By 15 o'clock on December 25, all major repairs were carried out in full.
Donetsk filtering station has been repeatedly cut off power due to the fighting.
Previously, water supplies to some settlements of Donetsk Region had to be disconnected on 23 December.