According to Ukraine, the country's power and water supplies have been severely impacted after Russia launched more than 50 missiles at important infrastructure.
According to Mayor Vitaliy Klitschko, 350,000 flats lacked electricity and 80% of Kyiv's citizens lacked access to water.
Energy plants were hit in Kharkiv, a city in the northeast.
Russia said that Ukraine's military command and energy infrastructure were the target of its long-range, high-precision weapons.
Additionally, all "specified objectives were struck," according to the nation's defence minister.
Russia accused Ukraine of carrying out a drone attack on its Black Sea Fleet in the annexation of Crimea, prompting the strikes.
Following the Russian attack that damaged an energy complex close to the city, Mr. Klitschko reported water problems in Kyiv. Within three to four hours, he said, the supply would be partially restored.
He added that engineers were being sent out right once to restore the source of energy.
The city authorities said that "no hits were reported" in Kyiv itself because to "the efficient operation of the air defence personnel."
Additionally, reports of missile strikes on Monday morning came from Lviv in western Ukraine, Dnipropetrovsk and Zaporizhzhia in the south-east, and the central Vinnytsia region.
There are also reports of damage to a facility at the Dnipro hydroelectric power plant in the Zaporizhzhia region.
In total, 18 facilities, the majority of which produced energy, were damaged throughout 10 regions of Ukraine.
If there were any casualties, it was not immediately known.
Fearing additional strikes, locals in the targeted areas were asked to remain in shelters. Additionally, they were informed that "emergency power disruptions" were being implemented nationwide.
A missile that Ukraine had fired down reportedly crashed in the "northern end of the town of Naslavcea" close to the Ukrainian border, according to authorities in neighbouring Moldova. Although there were no reports of any casualties, numerous residences had their windows broken.
According to Yuriy Ihnat, a spokesman for the Ukrainian Air Force, Russia utilised its strategic bombers to execute their "massive" strikes.
Later, the military of Ukraine reported that 44 of the more than 50 X-101 and X-555 cruise missiles launched from the Caspian Sea and the Rostov region of Russia had been destroyed.
Dmytro Kuleba, the foreign minister of Ukraine, claimed that "Russia fights civilians rather than on the battlefield."
Before the chilly winter months, Russia has reportedly destroyed about a third of Ukraine's power plants and other energy-generating facilities in a series of lethal missile and drone operations in recent weeks.
Targeting civilian infrastructure, according to Ukraine and its Western backers, constitutes war crimes.
