KYIV, Ukraine (AP) — About 4,000 buildings in Kyiv remained without heating Wednesday, and nearly 60% of the Ukrainian capital was without power, Ukrainian President Volodymyr Zelenskyy said, after days of Russian bombardment of Ukraine’s power grid . With temperatures falling as low as minus 20 C (minus 4 F) in Kyiv, Ukraine is seeing one of the coldest winters in years, deepening the hardship of Ukrainians almost four years after Russia launched a full-scale invasion . A yearlong push by the