This is the dramatic moment a hero passerby rescued a schoolboy who was being carried away by floodwater in Vietnam.

The youngster was engulfed by the muddy torrents that had killed at least 14 people and displaced more than 128,000 residents in Da Nang.

Miraculously, a pedestrian who was livestreaming to friends to show them the devastation spotted the youngster.

Heroic footage shows how Tran Trong Huan and another local clambered down the riverbank to reach the boy amid the debris. A third person helped to pull the boy from the fast-flowing deluge.

Tran said: 'When we heard someone shout that a child was drifting, we just acted on instinct. Saving him was the only thing on our minds.'

The youngster was in shock and having breathing difficulties. He was given first aid for around 15 minutes before his relatives arrived and took him to the hospital.

Local media reported that the boy had fallen into the river further upstream shortly before he was found. His family home was around two miles away from the point he was rescued.

It came Central Vietnam was hit by torrential rain, causing severe flooding. Authorities reported at least 14 deaths and more than 128,000 homes submerged across 90 communes.

Officials said that heavy rain across the region had caused riverbanks to become slippery, while strong currents had dragged away items.

Water levels reached up to two meters in several neighbourhoods, including Quang Dien Commune and Hoa Chau Ward.

Eight people remain missing, and 19 others were injured as the freak weather also triggered landslides.