On 26 August, a devastating flash flood tore through a Himalayan valley on the Nepal-Tibet border, killing more than 1,300 people.
Within hours, videos began circulating on social media. Many were real clips showing the disaster unfolding, but others raised new questions.
In this episode, BBC Verify correspondent Merlyn Thomas takes you behind the scenes as our team works to piece together the story in real time and explains how with any natural disaster, one of the first things we see is a rush of misinformation.
Follow the clues with us in the newsroom as we geolocate online videos, debunk AI-generated content and use satellite imagery to try to understand what happened.
This is BBC Verify’s reporting process as you’ve never seen before.
In this video:
00:00 – Is this real?
01:01 – Reconstructing the disaster
1:55 – How we tell real from fake
2:21 – Piecing together geolocated footage
3:10 – What do we mean by “verify”
4:07 – Aftermath and moment of glacial collapse
6:13 – Survivors
7:28 – What satellite imagery can tell us
8:11 – Is this the same survivor house?
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