About 4.5 million Ukrainian consumers were dealing with power outages as of Thursday evening, according to President Volodymr Zelensky.
Households across the country have been temporarily disconnected from energy supply under an emergency schedule aimed at stabilizing the nation's fragile electric grid. Russia has been bombing and destroying civilian infrastructure, ushering in fears of a cold, dark winter.
Most people are affected in the capital, Kyiv, and nine other regions: Dnipropetrovsk, Zhytomyr, Zaporizhzhia, Sumy, Kirovohrad, Kharkiv, Chernihiv, Khmelnytskyi and Cherkasy. Power outages are also possible in other areas.
"The very fact that Russia has resorted to terror against the energy sector indicates the weakness of the enemy. They cannot defeat Ukraine on the battlefield and therefore they are trying to break our people in this way," Zelensky said.
Some background: Kyiv's Western allies have condemned Russia's focus on dismantling Ukrainian energy infrastructure ahead of winter.
European Union foreign policy chief Josep Borrell said Thursday that G7 countries have a "moral duty" to help Ukraine, as Putin counts on the winter to help his forces batter Ukraine.