According to Prime Minister Denys Shmyhal, Ukraine urgently needs help worth $1 billion to restore the country's energy grid and central heating system to normal operation.
In a speech to the Organization for Economic Cooperation and Development, Shmyhal said that half of the nation's important infrastructure facilities had been damaged by Russian airstrikes in recent weeks.
He claimed that restoration work required a three-stage procedure.
"But the main priority now is the stage of survival - quickly restоring critical infrastructure and the energy sector to get through the winter," Shmyhal said. "The approximate cost of urgent help for the power sector stands at $500 million."
"The approximate cost of urgent help for the centralized heating sector stands at a further $500 million."
Since October, Russia has attacked Ukrainian energy infrastructure and other locations with missile and drone operations almost every week.
According to data from the World Bank, as of last June, Ukraine required $349 billion to move forward with restoration efforts. Shmyhal used this information in his speech to the OECD.
The worst conflict in Europe since World War II, which Moscow describes as a "special military operation" and Ukraine and its allies term an unjustified act of aggression, has no peace talks underway and no end in sight.
According to Sergei Vershinin, Russia's deputy foreign minister, the U.S. still does not have a "constructive" stance on the situation in Ukraine.
The White House stated that President Joe Biden told Ukraine's Volodymyr Zelenskiy on Sunday that Washington was giving priority to raising Ukraine's air defenses. In the phone call, Zelenskiy claimed he praised Biden for the "unprecedented defense and financial" support the U.S. has given.
In response to a question regarding the security assurances Moscow is looking for from NATO, Polish President Andrzej Duda said the organization could promise that it would not treat Russia the same way that Russia is treating Ukraine.
After Russian drones produced in Iran attacked two energy installations on Saturday, operations at the Ukrainian Black Sea port of Odesa were halted until Monday. According to national grid operator Ukrenergo, power is only gradually being restored to 1.5 million people, and the situation is still challenging.
In addition, the capital Kyiv, the Kyiv region, four regions in western Ukraine, and the Dnipropetrovsk region in the middle of the country, according to Zelenskiy, are experiencing "very difficult" power supply issues.
Fourteen communities in the Kyiv region, according to the administration, still have no electricity, and another 37 have intermittent power.
