Watch: Schoolgirl gets shock of her life after being sucked down flooded drain in Nepal

A Nepalese schoolgirl cautiously treading through a flooded street has literally vanished in an instant, after she was sucked down an open drain.

Miraculously, the 13-year-old survived the terrifying submerging, as she surfaced 20 metres down the Kathmandu street at the other end of the drain.

The concerned filmers, located in an overlooking building, can be heard crying as the girl disappears.

The surrounding scene captured on the video is one of chaos, as people try to escape the flood rapids that have covered the street in knee-deep water.