Parts of the city of Kyiv have been left without power after a torrid 36 hours of attacks from Russia killed at least five people.
Explosions were heard in the Ukrainian capital on Tuesday morning, with sirens going off as people were warned to stay indoors.
Power and water have now been cut in Zhytomyr, which is just west of Kyiv, while two facilities have been badly damaged in Dnipro.
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President Volodymyr Zelenskyy said on Twitter on Tuesday that in the past eight days, "30% of Ukraine's power stations have been destroyed, causing massive blackouts across the country".
The latest attacks saw 'kamikaze drones' - which had been built in Iran - dropped onto Ukrainian cities, killing five people in Kyiv and four in the northern region of Sumy.
Shahed-136 unmanned aerial vehicles (UAVs) were used, Ukraine claim, though both Russia and Iran deny the usage of the deadly missiles.
A number of regions are facing blackouts which has led to a mass buying of generators and gas burners.
Ukrainian MP Lesia Vasylenko said the attacks were expected.
"We were expecting that Russia will intensify attacks on energy infrastructure and civilian infrastructure and increase the urban warfare towards autumn and here we are exactly with that scenario taking place," she told the BBC.
EU foreign policy leader Josep Borrell said they are gathering evidence" on the Iranian drones and are ready to act - leading to the possibility of harsher sanctions on Russia..
The illegal invasion of Ukraine began back in February.
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