KYIV, Ukraine — Olena Janchuk spends another day of freezing isolation in her high-rise apartment.
The former kindergarten teacher has severe rheumatoid arthritis, and has been trapped for weeks on the 19th floor of her Kyiv tower block, 650 steps from the ground.
Long daily blackouts caused by Russia's bombardment of power plants and transmission lines have made working elevators a luxury.
With January temperatures plummeting to minus 10 degrees Celsius (14 degrees Fahrenheit), there's a permanent line of frost on the inside of Janchuk's windows, white patterns creeping across the glass by morning.
The 53-year-old huddles over a makeshift fireplace of candles arranged beneath stacked bricks, designed to absorb and slowly release heat. USB charging cables snake across the floor from overloaded power strips, while her electric blanket is hooked up to a power bank rationed for the coldest hours.
''When there's no light and heat for seventeen and a half hours, you have to come up with something,'' she said. ''The bricks work best in a small room, so we stay in there.''
By day, the family shifts into rooms that catch the winter sun, the function of each space changing with the blackout schedule. At night, heavy clothes stay on indoors as the apartment cools rapidly without central heating.
Kyiv, a city of about 3 million people, is dominated by tower blocks, many from the Soviet era, now left without power for most of the day.