CATCH ME UP
Drone footage captured a glacier breaking apart near Langtang Lirung in Nepal.
The collapse was reported shortly before flash floods hit parts of Nepal and Tibet.
One report says the footage was taken by a Chinese photographer using a drone.
The resulting avalanche and debris surge swelled the Bhotekoshi and Trishuli rivers.
Why it mattersThe drone footage documents a collapse that helped trigger deadly floods, clarifying the hazard and the scale of risk facing mountain communities.
More context
The disaster is reported to have killed 903 people in Nepal and 16 in Tibet.
More than 4,500 people are reported missing.
Prime Minister Balendra Shah said difficult terrain and adverse weather are hampering rescue and damage assessment.