Russia launched nearly 400 drones and 29 missiles at Ukraine overnight.

The full-scale invasion and war will enter its fifth year next week.

Russia has repeatedly targeted Ukraine's energy infrastructure,

leaving millions there without heat or electricity for weeks at a time.

Producer and videographer Amanda Bailey in Kiev and Nick Schifrin report now

on residents of Ukraine's capital under fire in record-setting cold.

In Kiev, this is a dark, bitter winter.

A once bustling European capital, now the night's streets lie mostly desolate and cold.

A city whose homes look as Russia wants them, empty, its residents living in shadows.

73-year-old Lutmila Baccarina cooks in her 19th floor apartment by flashlight and gas burner.

This winter, the temperatures has dropped to minus 14 degrees

Fahrenheit. The windows are lined with ice. She helps her daughter stay warm. The power

plants here provide both light and heat. They've had neither for up to 17 hours a day.

I'm tired. It's really tiring, to be honest. When you don't go outside and you don't see the sun, when there's no light and you can't just go down to the store.

When my husband is at work, my mother and I are dealing with all this together.

My mother and I, we support each other.

There is no limit to the support that 63-year-old Vasa Levanovich will give to his 40-year-old son, Taras.

But in blackouts, the burden is heavier.

Tarras is disabled and can't walk, and no electricity means no elevator.

Vassel says he feels like the war has set them back hundreds of years.

Inside, no power or heat, so the warmth comes from Vassel, caring for his son and from the Orthodox Christmas

trimmings.

...