Kyiv and many Ukrainian regions faced extensive power cuts and outages as crews struggled to repair infrastructure battered by Russian air attacks.
Power was set to be reduced in most regions for eight to 16 hours on November 9, state energy provider Ukrenergo warned.
"It is difficult to recall such a [large] number of direct strikes on energy facilities since the beginning of the invasion," company spokeswoman Svitlana Hrynchuk told Ukrainian media on November 8.
Even before the onset of cold weather across Ukraine, Russia had intensified its campaign to take out the country's power grid, as well as natural gas facilities and pipelines, in an effort to freeze and demoralize Ukrainians.
At least seven people were killed and an unknown number of others wounded in the Russian attacks on November 7, prompting President Volodymyr Zelenskyy to again urge Kyiv's allies to punish Russia and pressure President Vladimir Putin.
"Any [further] weakening…only encourages Putin to prolong the war, inflict more damage on our country, our people, and others around the world," he said in his nightly video address.
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Russian Drone Strike Hits Dnipro Apartment Block
Foreign Minister Andriy Sybiha said Russia had targeted substations that provided power to two nuclear facilities.
"These were not accidental, but well-planned strikes. Russia is deliberately jeopardizing Europe's nuclear safety," he said in a post to X. He called for an urgent meeting of the International Atomic Energy Agency, the UN nuclear watchdog, to respond to the "unacceptable risks."
IAEA director Rafael Grossi warned of the danger of military strikes on nuclear plant electrical substations.
"I continue to call for maximum military restraint in order to maintain nuclear safety and avoid an accident with serious radiological consequences,” he said in a statement.
Grossi also said Ukraine's biggest nuclear facility, in Zaporizhzhya, had regained access to back-up electricity from the grid for the first time in six months. The plant, which is under Russian control, has seen interruptions that have endangered critical plant infrastructure, like pumps that supply cooling water.
Russia launched more than 450 drones and 45 missiles in the November 8 barrage, Ukrainian officials said.
Russia's Defense Ministry, meanwhile, said it had launched "a massive strike with high-precision long-range air, ground and sea-based weapons" and claimed it targeted weapon production and energy facilities in Ukraine.
SEE ALSO: Battle For Ukraine's Pokrovsk Escalates As Russian Forces Press OnPower cuts were also undertaken in the Poltava region under a special emergency outage schedule ordered by Ukrenergo, with Kremenchuk -- a city of 200,000 people -- reporting a complete blackout, prompting the opening of temporary public hubs offering heat, power, Internet, water, and basic aid.
In Dnipro, a Russian drone strike hit a nine‑story residential building, with at least three people reported killed. A two-day mourning has been declared.
Russian attacks also cut power to subway stations in Ukraine's second largest city, Kharkiv, Mayor Ihor Terekhov said.
Subways and trams have been fully stopped and water supplies have also been disrupted, he said in a post to Telegram.
Ukraine Hits Back At Sites In Russia
For its part, Ukraine has conducted its own near-nightly drone barrage of Russian energy facilities, a campaign that has sharply reduced Russia's ability to produce gasoline and other refined oil products.
In Russian border regions, like Belgorod and Kursk, Ukraine has hit electricity infrastructure, along with municipal heating plants.
More than 20,000 people were reported without power in several border regions on November 9, Belgorod Governor Vyacheslav Gladkov said.
Unconfirmed reports said that the municipal heating plant in Voronezh, about 200 kilometers east of the Russian border, had been hit by Ukrainian drones.
The Defense Ministry reportedthat more than 40 Ukrainian drones were downed overnight, mostly over the Bryansk region. The Defense Ministry made no mention of the Voronezh region.
SEE ALSO: Ex-NATO Chief Stoltenberg Says More Arms For Kyiv Will 'Change Putin's Calculus'Kyiv has urged the United States to supply long‑range Tomahawk missiles to strike targets deep inside Russia but President Donald Trump has repeatedly rebuffed the requests.
Moscow warned Washington against sending Tomahawks, with Putin calling the move a "completely new stage of escalation" in US-Russia relations.
Pressure Heightens Around Pokrovsk
As Ukraine battled with the latest attacks on its energy sector, its forces were also struggling to hold the strategic Donetsk city of Pokrovsk.
Ukrainian authorities have acknowledged that the situation in the region is "difficult" but have denied Russian claims that Pokrovsk is surrounded.
The city has become the fiercest area on Ukraine's front line this year, with fighting there resembling some of the bloodiest and longest battles of the war.
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House-To-House Fighting In Pokrovsk As Russia Tries To Capture Key City
Ukrainian military expert Oleksiy Hetman told RFE/RL that while the situation is growing difficult, Ukrainian forces still have strongholds prepared west of the city, which would allow them to repel further Russian assaults.
Journalists' Van Hit By Drone
Separately, Western reporters said a van carrying an Austrian and a Spanish journalist was attacked by a drone near the front line in eastern Ukraine on November 8.
The Austrian Broadcasting Corporation said there were no injuries from the incident, which occurred as they were accompanying an aid organization to the embattled city of Kostyantynivka.