Overnight, Moscow's missile and drone strikes have led to blackouts in large parts of Ukraine's capital, Kyiv.
A number of civilians were hurt while residents in the city's east were left without electricity and dealt with problems to water supplies, according to city officials.
Meanwhile, a young boy was killed in a distinct aerial attack in the Zaporizhzhia region in the southern area, based on information from regional authorities.
Moscow has escalated attacks on power infrastructure over the past few days, while Ukrainian leadership has called for "substantial measures" from international partners to apply pressure on Moscow.
"What is required is not symbolic gestures but strong steps - from the America, the EU and the G7 - in delivering defensive weapons and applying sanctions," he wrote in a online statement.
Officials stated that hundreds of unmanned aircraft and more than 30 projectiles struck Ukraine's energy infrastructure, describing such assaults as "cynical and calculated" and against "essential services" as temperatures become colder.
Energy officials said Russia was "inflicting a massive strike" and maintenance teams were striving to fix the damage.
A wave of strikes hit energy infrastructure and residential structures in the capital.
Several of the people hurt in the assaults on the city have been transported for medical care, as confirmed by local officials.
Area administrators said the metropolitan region endured significant strikes during nighttime hours. A seven-year-old child lost their life and multiple civilians were injured.
The assaults succeed evenings of aerial attacks in the area, parts of which are occupied by Russian forces.
The whole nation is in a state of readiness for hypersonic Kinzhal missile strikes, which are more difficult to detect.
National leaders told reporters that Russia was purposely seeking to damage the country's energy grid, with strikes already impacting fuel infrastructure.
He said energy workers and authorities were bracing for additional strikes.
