The power disruption occurred at two switching stations, which supply Tajikistan with electric power transited from neighboring Uzbekistan. Power supplies in Dushanbe will be cut off from 8 a.m. to 4 p.m. local time (3 a.m. - 11 a.m. GMT) as a result.
The Central Asian state's energy holding, Barki Tochik, said life support facilities and government buildings in central Dushanbe would be unaffected.
A company spokesperson said a power conservation plan has been introduced in Tajikistan Wednesday as the water level at the Nurek hydropower plant in the southwest had dropped one meter below the critical mark.
"If the water level continues to fall, work at the plant will have to be stopped," the source said.
There is a shortage of water in reservoirs at the hydropower plant, as snow has not started melting yet, while water reserves were used up over the winter. Electric power generation has declined by 33%, to 30 million kilowatt-hours per day.
"The situation is the same as in Uzbekistan and Kyrgyzstan, the main electricity exporters to Tajikistan," the source said.