KYIV, Ukraine (AP) — Rolling blackouts across Ukraine may continue through March, according to one of the country’s energy chiefs, as Ukrainians brace for a grim winter after weeks of relentless Russian strikes against its power grid.

Sergey Kovalenko, CEO of private energy provider DTEK Yasno, said in a Facebook post late Monday that the company was under instructions from Ukraine’s state grid operator to resume emergency blackouts in the areas it covers, including the capital Kyiv and the eastern Dnipropetrovsk region.

“Although there are fewer blackouts now, I want everyone to understand: Most likely, Ukrainians will have to live with blackouts until at least the end of March,” Kovalenko warned.

“I think we need to be prepared for different options, even the worst ones. Stock up on warm clothes, blankets, think about what will help you wait out a long shutdown,” he said, addressing Ukrainian residents.

Russia has been pummeling Ukraine’s power grid and other infrastructure from the air for weeks, as the war approaches its nine-month milestone. That onslaught has caused widespread blackouts and deprived millions of Ukrainians of electricity, heat and water.

Temperatures commonly stick below freezing in Ukraine in the winter months. Ukrainian authorities have started evacuating civilians from recently liberated sections of the southern Kherson and Mykolaiv regions out of fear that the winter will be hard to survive.

Kovalenko added that even if no more Russian strikes occur, scheduled outages will be needed across Ukraine to ensure that power is evenly distributed across the battered energy grid.

Ukrainian President Volodymyr Zelenskyy says Russian missile strikes have damaged more than 50% of the country’s energy facilities, and the World Health Organization is warning that millions face a “life-threatening” winter in Ukraine.

The battle for terrain has continued unabated despite the deteriorating weather conditions, with Ukrainian forces pressing against Russian positions as part of a weeks-long counteroffensive and Moscow’s forces keeping up shelling and missile strikes.

In a key battlefield development, a Ukrainian official acknowledged that Kyiv’s forces are attacking Russian positions on the Kinburn Spit, which is a gateway to the Black Sea basin and parts of the southern Kherson region that are still under Russian control.

Despite an information blackout around the operation, Natalya Humenyuk, a spokesperson for the Ukrainian army’s Operational Command South, said in televised remarks that Ukrainian forces are “continuing a military operation” in the area.

The Kinburn Spit is Russia’s last outpost in Ukraine’s southern Mykolayiv region, directly west of Kherson. Ukrainian forces recently liberated other parts of the Kherson and Mykolaiv regions.

Moscow has used the Kinburn Spit as a staging ground for missile and artillery strikes on Ukrainian positions in the Mykolaiv province, and elsewhere along the Ukrainian-controlled Black Sea coast.

Ukraine recently recaptured the city of Kherson, on the western bank of the Dnieper River, and surrounding areas in a major battlefield advance.

Capturing the Kinburn Spit could help Ukrainian forces push into territory Russia still holds in the Kherson region “under significantly less Russian artillery fire” than an attempt at a direct crossing of the Dnieper would likely unleash, a Washington-based think tank said late Monday.

The Institute for the Study of War added that control of the area would help Kyiv alleviate Russian strikes on Ukraine’s southern seaports and allow Ukraine to increase its naval activity in the Black Sea.

Meanwhile, Ukraine’s presidential office said Tuesday morning that at least eight civilians were killed and 16 were injured over the previous 24 hours, as Moscow’s forces once again used drones, rockets and heavy artillery to pound eight Ukrainian regions.

Since Russia invaded its neighbor on Feb. 24, the war has killed at least 16,784 civilians and injured 10,189, the U.N. High Commissioner for Human Rights estimates.

In the eastern Donetsk region, fierce battles continued around the city of Bakhmut, where the Kremlin’s forces are keen to clinch an unambiguous victory after weeks of embarrassing military setbacks.

Speaking on Ukrainian TV, Donetsk Governor Pavlo Kyrylenko said Russia launched missiles at the city of Kramatorsk, home to the local headquarters of the Ukrainian military, and on the strategic city of Avdiivka.

Kyrylenko added that power supplies and communications are non-existent in most of the Donetsk region.

According to the Ukrainian presidential office, one civilian was killed and three others were wounded after Russia shelled the city of Kherson, which Ukrainian forces recaptured Nov. 10.