Watch: What caused the flash floods in the Nepal-Tibet border - BBC News

At least 270 people have died in the massive flash floods, while more than 800 others are missing.

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CloseThe US Geological Survey says the floods in the Nepal-Tibet border were triggered by a "glacial collapse" - meaning a glacier or part of a glacier had disintegrated.

Initial reports led authorities to believe that an earthquake had been the cause.

The cause of the glacial collapse has not been determined, but scientists have warned that Himalayan glaciers are melting at an accelerating rate due to rising temperatures and climate change.

More on this story: Collapsed glacier likely caused devastating Nepal-Tibet floods, scientists say