The Hazard municipal water system started turning on valves to send water to some customers north of the city along Ky. 15 on Thursday afternoon.
Main storage tanks in Hazard were at acceptable levels by then, City Manager Paul Feltner said. As long as the main two tanks in Hazard remain full, he said, the city can start filling customers' tanks and start service to areas along Ky. 80, Rowdy, Lost Creek, Vicco and Buckhorn.
"It's a slow process now" because workers have to guard against ice and air in pipes, Feltner said.
Also on Thursday, Anheuser-Busch said it is donating about 53,000 cans of drinking water to help with relief efforts in Perry County. The water is scheduled to arrive at 8 a.m. Friday. The Salvation Army and local emergency services will distribute the water.
Crews spent Thursday trying to keep the water treatment plant intake free of ice. The 7,000-customer system will be on a boil-water advisory into next week, he said.
The city had to shut off service to outlying areas to compensate for and find a huge leak near Fourseam on the south end of Hazard. It took about a week to find the leak, and storage tanks nearly bottomed out Wednesday, officials said.