Russia n strikes have crippled Kyiv 's heating and power systems, leaving hundreds of thousands in the cold. Repair crews work nonstop as corrosion and outages cause constant breakdowns. Vulnerable residents rely on mobile heating units and resilience centers. Mayor Klitschko warns over 500 buildings lack heat, while political tensions rise amid the crisis. With over 250 attacks on Ukraine 's energy infrastructure since October, more are expected.