The Russian-occupied Zaporizhzhia Nuclear Power Plant is short of cooling water, diesel, and qualified staff, Ukraine’s Defense Intelligence (HUR) said on 20 October, warning of rising risks to nuclear safety. The water level in the plant’s cooling pond fell to 12.27 meters on 12 October, down from 12.86 meters in July, while the plant needs at least 15 meters to fully meet its needs, according to HUR. Russian managers are also considering cutting the number of backup generators kept on automatic standby, which would inevitably raise the risk of emergencies, the intelligence agency said.

Europe’s largest nuclear plant has been under Russian control since March 2022. Its six reactors have been in cold shutdown since April 2024, but they and their spent fuel still need constant cooling, which depends on water, on a single remaining external power line, and on diesel generators as the last resort. The International Atomic Energy Agency (IAEA) warned on 16 October that depleted diesel reserves increase the risk that nuclear safety is challenged if the plant loses power again, and that the situation may become acute in winter.

A pond with no source to refill it

The cooling pond has been sinking since Russia destroyed the Kakhovka dam in June 2023, cutting off the reservoir that fed it. Energoatom, Ukraine’s state nuclear operator, recorded 15.70 meters in October 2023. By June 2025, the level had fallen below 14 meters against a norm of above 16, Oleh Korikov, head of Ukraine’s State Nuclear Regulatory Inspectorate, said.

HUR’s figures show the decline continuing this year, from 12.86 meters in July to 12.63 in early August, 12.55 at the end of August, and 12.34 at the start of October. In 2025, the IAEA said groundwater wells on site were supplying cooling water for the safety systems. Its team had not been allowed to inspect a new dam in the cooling channel, access IAEA Director General Rafael Grossi called essential to assess the cooling water situation.

Diesel for a blackout that Russia cannot supply

If the plant loses external power, its diesel generators would burn about 150 metric tons of fuel a day in a prolonged blackout, HUR said. The occupation administration cannot deliver enough, so reserves stay minimal. Russian managers are also looking for covert fuel supplies, including low-quality fuel, without informing the IAEA mission, according to HUR.

The IAEA has already reported fewer generators on automatic standby. Since late September, only four of the plant’s 20 emergency generators would start automatically in a blackout, with the rest needing manual connection, which Grossi said deviates from normal practice. No diesel deliveries have reached the plant since March, the agency said on 16 October.

The plant spent nearly three weeks on generators after losing its last external line on 20 August, EP reported, until the Ferosplavna-1 line was restored under an IAEA-brokered ceasefire. The main 750 kV Dniprovska line remains out. HUR said the Kremlin rejected Ukraine’s proposal to supply power through it, which raises the nuclear safety risks.

A plant short of the people who know it

About 5,000 people now work at the plant, against roughly 11,000 before the full-scale invasion, and only 1,450 were on site, HUR said. The plant lacks specialists who know its equipment, as well as the experts needed for repairs and for reconnecting it to external power. Russian managers plan training courses for applicants from Russian regions to replace Ukrainian staff, according to HUR.

In Enerhodar, the city where the plant’s staff live, mobile, internet, electricity, and water supplies keep failing, HUR said.

Drones struck the seized Ukrtelecom building in occupied Luhansk overnight on 21 October, hitting the mobile operator Russia’s occupation authorities run there under the name “Lugacom,” Russian Telegram channel Astra and Ukrainian monitoring channels reported. The strike came a night after drones hit “Ugletelecom,” the occupation’s telecom operator in Donetsk, which reportedly runs on equipment seized from Ukrainian companies. Footage posted by Ukrainian monitors shows heavy fire damage inside the Luhansk building. Ukraine has not officially commented.

Ukraine has spent months hitting the supply lines, depots, and infrastructure that sustain Russia’s occupation of southern and eastern Ukraine, with mid-range drones striking trucks, trains, and communications towers well behind the front. This spring the commander of Ukraine’s Unmanned Systems Forces, Robert “Madyar” Brovdi, promised Russian troops in occupied territory a “stone age.” This time the targets were the networks the occupation runs on.

A burned-out Ukrtelecom building in Luhansk

Residents reported explosions in Luhansk overnight, and the former Ukrtelecom building was attacked by a drone, Astra reported, citing its readers. The occupation runs its mobile operator, “Lugacom,” from the seized building, and built its network on equipment taken from Ukraine’s Kyivstar, according to dev.ua. The building also houses an occupation-run telecom services center. Luhansk is situated in the easternmost Ukrainian region and has been occupied since 2014.

Ukrainian monitoring channel Exilenova+ said Ukraine’s Defense Forces struck the building, which also hosts an information technology and technical support center. A video it posted shows extensive burning inside. Petro Andriushchenko, head of the Center for the Study of Occupation, said the drones hit a data center in the building.

Occupation officials had not commented, according to NV. In September, drones hit a hardware store in Luhansk, sparking a large fire. Earlier this month, fires broke out at a Russian supply base in Khrustalnyi, also in occupied Luhansk Oblast.

Donetsk’s occupation telecom operator hit the night before

The night before, drones struck “Ugletelecom,” one of the key communications operators in occupied Donetsk Oblast, Exilenova+ reported. It operates from an office building at 60 Postysheva Street, where Ukraine’s state holding company Donbasugleobespechenie was registered before the occupation, according to RBC-Ukraine. Astra found about 27 organizations registered at the address, including internet provider Fticom, and damage on four floors.

Ugletelecom runs on equipment seized from Ukrainian companies, Donetsk-focused outlet Kochegarka reported, citing local sources. The occupation also moved local businesses that had used Ukrtelecom over to it, according to dev.ua. Residents had reported powerful explosions in the city.

Power cuts across the occupied territories

In occupied Donetsk Oblast, drones attacked the 330 kV Pivdenna substation in Chystiakove, and locals reported outages, Telegram channel DroneBomber said, calling the report preliminary. Occupied Donetsk went into a blackout on the evening of 20 October after strikes on its power supply, Andriushchenko said. He also reported air defense activity and hits in the Mariupol area.

In occupied Crimea, residents of Krasnoperekopsk reported explosions and hits near the railway station, then partial power cuts, monitoring channel Crimean Wind said. In occupied Melitopol, drones tried to attack the city’s power facilities at around 03:30 but missed, Russian senator Dmitry Rogozin claimed.

French mapper Clément Molin counted 770 confirmed Ukrainian drone strikes on Russian trucks in the logistics zone 10 km behind the front line in September, up from 630 in August.

Russian drones struck a 24-story apartment building in Kyiv, a university building in Kremenchuk, warehouses, and hypermarkets overnight on 21 October, killing two people in the capital and an elderly couple near Kharkiv, Ukrainian officials said. The attack went well beyond Ukraine’s power grid, hitting places where people live, study, and shop. Over the past day, Russian strikes also killed three more civilians and injured dozens across several oblasts.

Russia has kept up nightly drone and missile attacks on Ukrainian cities through the autumn, mostly aimed at the energy system. It struck Ukraine’s energy 76 times during a US-declared truce, and fired 39 ballistic missiles at the grid three days after Washington announced it. This time the targets also included homes, a university, warehouses, and shops.

Overnight, Russia launched 186 Shahed-type and other attack drones, 88 of them jet-powered, along with Iskander-K cruise missiles, Ukraine’s Air Force said. Air defenses downed or jammed 150 drones. Hits were recorded at 27 locations, and debris fell at 13 more.

Two killed on the 20th floor in Kyiv

A drone hit a 24-story residential building in Kyiv’s Sviatoshynskyi district at the level of the 20th floor, starting a fire, Mayor Vitali Klitschko said. The fire spread over about 70 square meters, and rescuers found the bodies of two people while clearing debris, the State Emergency Service said. Two people were injured and hospitalized, Klitschko said, including a 46-year-old man who was walking past the building, according to the police.

In the Desnianskyi district, seven parked cars caught fire, the State Emergency Service said; police put the number at about 10. The evening before, drones hit a warehouse building in Desnianskyi and a transport facility in Solomianskyi district.

An elderly couple killed near Kharkiv

In the village of Korotych near Kharkiv, Russian drones killed an 81-year-old woman and an 83-year-old man, Kharkiv Oblast Governor Oleh Syniehubov said. Rescuers recovered their bodies from the rubble of their house, the State Emergency Service said. Eleven people, including a two-month-old boy and an eight-year-old girl, were treated for acute stress, and 13 houses were damaged.

A university, warehouses, and hypermarkets

In Kremenchuk, a drone hit a building of the Mykhailo Ostrohradskyi National University, setting it on fire, the State Emergency Service said. Three people were injured, including a 16-year-old who was hospitalized with a concussion, Poltava Oblast Governor Vitalii Diakivnych said. In the Poltava community, drones damaged an administrative building and warehouses.

In Lviv Oblast, an attack set fire to an enterprise in a village in Lviv district and injured two people, while a house was damaged in a neighboring village, the State Emergency Service said. In Uman, drones hit a hypermarket and damaged a hotel, injuring one person, Cherkasy Oblast Governor Ihor Taburets said.

On the evening of 20 October, a drone hit an Epicentr hypermarket in Pervomaisk, Mykolaiv Oblast, injuring eight people, acting Governor Heorhii Reshetilov said. Russia also struck a hypermarket in Rivne Oblast several times that day, injuring four and forcing rescuers to pull back while they fought the fire, the State Emergency Service said.

More dead and injured over the past day

The overnight strikes followed a day of attacks. In Kyiv, Russian strikes on 20 October killed one person and injured 21, three of them seriously, Klitschko said. An administrative building caught fire, rescuers freed four people trapped on its upper floors, and a healthcare facility was damaged, the State Emergency Service said. In Dnipropetrovsk Oblast, two men were killed and seven people injured that day, regional officials said.

In Kharkiv Oblast, Russian attacks over the past day injured 11 more people in Kharkiv, Derhachi, and Shestakove, Syniehubov said. In Kherson Oblast, 13 people were injured, three of them children, the regional administration reported. In the Chernihiv region, an 89-year-old woman and a young woman were hurt in strikes on villages and on Novhorod-Siverskyi, Governor Viacheslav Chaus said, and a 21-year-old woman was injured in the Sumy community, according to the Sumy regional administration.

More than 5,000 subscribers lost power in Volyn Oblast’s Lutsk district, Governor Roman Romaniuk said. In Ternopil Oblast’s Kremenets district, 7,949 subscribers remained without power after earlier Russian strikes on energy facilities, the regional administration reported.

European Parliament Vice President Pina Picierno has announced a hunger strike to draw international attention to the humanitarian disaster in Russian-occupied Oleshky in Ukraine’s Kherson Oblast, she wrote on X on 20 October. The Italian lawmaker called on associations, citizens, and institutions to join her and demand a humanitarian truce, food and medicine for residents, and safe evacuation for those who want to leave.

Russia has occupied the left bank of the Dnipro in Kherson Oblast since 2022. Its forces have cut Oleshky off, leaving its remaining residents short of food and medicine, Ukrainian officials and UN monitors say. Oleshky had about 24,000 residents before the full-scale invasion. About 1,700 remain, including 47 children, Danielle Bell, head of the UN Human Rights Monitoring Mission in Ukraine, said. Picierno’s protest adds to growing international pressure after Pope Leo XIV asked Russian leader Vladimir Putin for a truce to help the town.

“This battle cannot be mine alone”

In Oleshky, thousands of people are trapped in territory occupied by the Russian army, without regular access to food and medicine, Picierno wrote. Mined areas make escape extremely dangerous, she added.

“Those who stay risk dying of hunger, those who try to leave risk their lives,” she wrote. “To draw international attention to this emergency, I have announced a hunger strike. But this battle cannot be mine alone.”

She said the campaign is meant to support the efforts of Pope Leo XIV and others trying to avert a humanitarian tragedy. By the morning of 21 October, 277 people had joined the initiative, Liga reported.

Picierno, who left Italy’s Democratic Party in June and joined the Renew Europe group, has backed military aid to Ukraine, tougher sanctions on Russia, and Ukraine’s bid to join the EU, according to Liga.

A town Kyiv calls a “death trap”

On 16 October, Pope Leo XIV expressed deep concern to Putin about the situation in Oleshky. He asked for a truce so that food and medical aid could be delivered and civilians could leave voluntarily and safely.

A day later, Ukraine’s Foreign Minister Andrii Sybiha urged the UN and the International Committee of the Red Cross to help evacuate residents.

“Russians are trying to turn the Ukrainian town of Oleshky into a death trap,” Sybiha wrote. “Dozens of bodies lie in the streets or in homes, as Russians forbid residents from burying them.”

Ukraine has flown tons of food into the town by drone. Russian troops seize some of the parcels and accuse the people who receive them of cooperating with Ukraine, local officials say. A resident said eggs there cost nearly 20 times the US price.

Evacuation talks “moved forward”

Talks with Russia on a ceasefire and evacuation are at the stage of “agreeing the final details,” Ukraine’s human rights ombudsman Dmytro Lubinets said on 18 October. He estimated that about 6,000 civilians, including up to 200 children, remain in Oleshky and six nearby settlements. He gave no timeline.

On 20 October, President of Ukraine Volodymyr Zelenskyy said Ukraine was doing everything it could to help people in Oleshky, calling the situation there “simply terrible.”