Water gushes through a breach in the Nova Kakhovka dam in the Russia-held Kherson region of Ukraine on Tuesday. The crucial dam, which formed the country’s largest reservoir, supplied water to large areas of the southeast and the Crimean Peninsula. Photo: VCG

Half the span of the dam appears destroyed as of Tuesday. The structure is still collapsing, according to Russia’s state-owned Tass news agency. Kyiv has accused Russia of exploding the dam, while Moscow blamed the destruction on Ukraine. Photo: VCG

A flooded area near the Nova Kakhovka dam on Tuesday. The collapse has been unleashing a torrent of water, flooding villages downstream. The reservoir also supplies cooling water to the Zaporizhzhia nuclear power plant, which lies upstream. The plant is not at immediate nuclear safety risk, the U.N. said. Photo: IC Photo

A community center stands in the flood-hit city of Novaya Kakhovka after the nearby dam was breached on Tuesday. Photo: VCG

Local residents carry their belongings as they leave a flooded neighborhood on Tuesday. Photo: VCG

An emergency worker carries belongings as residents are evacuated by boat in a Kherson neighborhood Tuesday. Photo: VCG

A local resident holds her pets as she stands inside her house that was flooded after the Nova Kakhovka dam blew up overnight. Photo: VCG

People wait to be evacuated at a train station on Tuesday. Photo: VCG