KYIV: Olena Janchuk spends another day of freezing isolation in her high-rise apartment. The former kindergarten teacher suffers from 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 -10 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.