Kathmandu, Aug. 27 -- A catastrophic flood swept down the Bhotekoshi river in Nepal's Rasuwa district on Wednesday, killing and displacing hundreds of people and destroying bridges and other infrastructure along the river corridor.

Bodies have since been recovered in Rasuwa and in districts including Nuwakot, Dhading, Chitwan, Tanahun, Gorkha and Nawalparasi East. Scientists and climate experts are investigating what triggered the sudden surge of water.

Here is what is known so far about the disaster along the Nepal-China border and downstream.

What happened at the Nepal-China border?

The Bhotekoshi rose with extraordinary speed at the Rasuwagadhi border crossing on Wednesday morning, sending people fleeing for safety.

Initial specul...