What to know

• Researchers said the flood was caused by a "compound crisis" shaped by long-term warming, glacier retreat, permafrost thaw and geological instability. A 2015 earthquake is also thought to have played a role.S1
• More than 1,400 people were killed and thousands are missing following the deluge on 26 August.S2
• Climate change was a core factor in last month's deadly glacial mountain collapse on the China-Nepal border that killed more than 1,400 people and left at least 6,600 missing, scientists said Thursday.S3