Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty in speech denouncing West

The U.S. will provide Ukraine with more than $53 million to acquire critical electric grid equipment to help its citizens get through the winter, the State Department announced Tuesday.

The announcement comes amid Russia's continued attacks against Ukraine's energy infrastructure.

"This new assistance is in addition to $55 million in emergency energy sector support for generators and other equipment to help restore emergency power and heat to local municipalities impacted by Russia’s attacks on Ukraine’s power system," the State Department said in a release.

-ABC News' Matt Seyler

Denise Brown, the United Nations Resident Coordinator in Ukraine, traveled to the Ukrainian cities of Kherson and Mykolaiv over the weekend to get an update on the humanitarian issues affecting the southern part of the country, according to the U.N.

Although repairs to the area's water system are finally able to commence, there is still a lot of work to be done to help the people in those cities, the U.N said.

"We continue to be concerned about the plight of civilians in Ukraine especially as winter sets in," a U.N. spokesperson said in a statement.

Some heating points have already been established in Mykolaiv to help people who cannot heat their homes, according to the U.N.

"Aid workers are providing supplies and generators to make these places functional," the U.N. said in a statement.

The agency added that donations and funding for humanitarian efforts are critical as the cold weather sets in.

All of Ukraine's regions are now connected to the European Union's energy system and all three nuclear power plants located in the Kyiv-controlled area are working, CEO of Ukrenergo grid operator Volodymyr Kudrytskyi announced.

"In one to two days, they will reach their normal planned capacity, and we expect to introduce planned rolling blackouts instead of emergency outages," Kudrytskyi said.

Power is slowly returning to all Ukrainian cities, but blackouts and emergency shutdowns continue. Power issues are the worst in Kyiv, Kirivigrad, Dnipropetrovsk, Kharkiv, Poltava and Lviv, according to Kudrytskyi.

Kyiv's critical infrastructure receives electricity, the water supply is fully restored and heating is being restored, but 50% of residential houses remain without power. Only one-third of houses currently have heating, according to the mayor.

-ABC News' Will Gretsky

Russian President Vladimir Putin met with more than a dozen mothers of Russian soldiers fighting in Ukraine, telling those who had lost sons that he and the entire leadership shared their suffering.

Putin said he has no regrets about launching what he calls Russia's "special military operation" against Ukraine.

-ABC News' Tanya Stukalova