People charge their devices, use internet connection and warm up inside a Point of Invincibility – a mobile heating point set in the town of Vyshgorod, outside of Kyiv on November 28, 2022, amid the Russian invasion of Ukraine. - With temperatures dipping below zero, repeated Russian attacks have left Ukraine's energy grid teetering on the brink of collapse and have disrupted power and water supplies to millions over recent weeks. (Photo by Genya SAVILOV / AFP)

People charge their devices, use internet connection and warm up inside a Point of Invincibility – a mobile heating point set in the town of Vyshgorod, outside of Kyiv on November 28, 2022, amid the Russian invasion of Ukraine. - With temperatures dipping below zero, repeated Russian attacks have left Ukraine's energy grid teetering on the brink of collapse and have disrupted power and water supplies to millions over recent weeks. (Photo by Genya SAVILOV / AFP)

People charge their devices, use internet connection and warm up inside a Point of Invincibility – a mobile heating point set in the town of Vyshgorod, outside of Kyiv on November 28, 2022, amid the Russian invasion of Ukraine. - With temperatures dipping below zero, repeated Russian attacks have left Ukraine's energy grid teetering on the brink of collapse and have disrupted power and water supplies to millions over recent weeks. (Photo by Genya SAVILOV / AFP)