Ukraine's largest energy provider, DTEK, is struggling to keep the power on due to frequent Russian attacks on the energy grid. Maxim Timchenko, CEO of DTEK, told the BBC that "we just don't have time to recover" from the waves of drone, cruise, and ballistic missile strikes. Most of Ukraine faces long power cuts as temperatures drop. President Volodymyr Zelensky said on Tuesday, "Every night Ukrainian parents hold their children in basements and shelters hoping our air defence will hold," warning that winter cold is a dangerous weapon. In the city of Odesa, tens of thousands have been without electricity for three days after a coordinated attack. Yana, a resident with power, shared how she invites friends to charge phones and offers water to others. Electricity is rationed with supplies available only a few hours daily. Kyiv resident Tetiana checks her phone every morning for power schedules and uses power banks to cope. About half of Ukraine’s power comes from three major nuclear plants, but the network transferring this power is badly damaged. DTEK runs around 10 coal-fueled power stations, which have faced attacks every three to four days. One plant was hit by five ballistic missiles recently. Repairing damages is difficult. Spare parts must be sourced from Europe now, costing $166 million this year alone. Despite these challenges, Timchenko insists, "We will not give up. We have a responsibility to millions of mothers to have power and heat." Eight DTEK engineers have died keeping the power running in the fiercest fighting regions. "Every day they risk their lives to keep power in this area," he added.