Dhaka, Sept. 20 -- Rising temperatures may have helped set the stage for a Himalayan glacier collapse that unleashed devastating floods across Nepal and Tibet in August, according to a study reported by the BBC.

More than 1,300 people were killed and over 5,000 remained missing after a huge section of glacier and rock fell from Langtang Lirung mountain on Aug 26.

The collapse sent about 110 million cubic metres of snow and ice into the valley, triggering a powerful flash flood that swept away homes, settlements, roads and bridges.

Researchers from Imperial College London and the World Weather Attribution group found unusually high temperatures before the collapse.

July and August were the warmest on record in the area, with temperatur...