Grossi’s comments were prompted by an announcement on Friday by Yevgeny Balitsky, the Russian-installed governor of the partially-occupied Zaporizhzhia province, that he had ordered the evacuation of civilians from 18 settlements in the area, including Enerhodar, which is located next to the power plant - Europe’s largest.
The settlements affected are about 50 to 70km from the front line of fighting between Ukraine and Russia, and Balitsky said that Ukraine had intensified attacks on the area in the past several days.
The region is also widely seen as a likely area where Ukraine may focus its anticipated spring counter-offensive.
The Ukrainian General Staff said on Sunday that the evacuation of Enerhodar had already begun.
According to an update posted on Facebook, the General Staff said the first residents evacuated were those who took Russian citizenship following the capture of the town by Moscow early in the war.
They were being taken to the Russia-occupied Azov Sea coast, about 200km to the southeast.
Grossi said that operating staff of the nuclear power plant, whose six reactors are all in shutdown mode, hadn’t been evacuated as of Saturday but that most live in Enerhodar and the situation has contributed to “increasingly tense, stressful and challenging conditions for personnel and their families”.
He added that IAEA experts at the nuclear site “are continuing to hear shelling on a regular basis”.
“We must act now to prevent the threat of a severe nuclear accident and its associated consequence for the population and the environment,” Grossi said. “This major nuclear facility must be protected. I will continue to press for a commitment by all sides to achieve this vital objective.”
Elsewhere, Russian shelling on Saturday and overnight killed six civilians and wounded four others in Ukraine’s southern Kherson region, according to a Telegram update published on Sunday by the local administration.
Five civilians were wounded in the eastern Donetsk region, the epicentre of the fighting in recent months, local Gov. Pavlo Kyrylenko reported on Sunday morning.
Meanwhile, Ukrainian forces overnight attacked the largest port in the Russia-occupied Crimean Peninsula with drones, a Kremlin-installed local official said on Telegram early Sunday.
According to the post by Mikhail Razvozhayev, the governor of Sevastopol, 10 Ukrainian drones targeted the city, three of which were shot down by air defence systems. Razvozhayev said that there had been no damage.