Newly obtained footage has captured the moment a massive glacier collapse on the Nepali side of the Langtang Lirung peak in the Himalayas triggered the catastrophic flash floods and mudslides that have devastated parts of Nepal and Tibet. Filmed by a Chinese tour guide, the video shows huge chunks of ice and rock breaking away from a ridge with an audible crack, sending debris plunging into the valley and forming a lake that later burst, sending a torrent of water and debris towards the Gyirong border crossing. The footage, verified by The New York Times, gives one of the clearest views yet of the 26 August disaster and helps explain how the destruction unfolded.

The death toll has now risen to 676, with nearly 3,000 people still missing across Nepal and Tibet, including more than 500 foreign tourists, 33 of them British. Search and rescue efforts resumed on Saturday after being paused by rain and fog, with a UK rapid deployment team arriving to assist British nationals, while authorities continue to monitor two upstream lakes amid fears of further flooding. Satellite images show entire settlements washed away, and the Rasuwagadhi border crossing, a key crossing point on the Nepal-Tibet border, has been completely destroyed along with the Friendship Bridge.