When a wall of icy debris from a glacial collapse on the China-Nepal border tore through his village last week, Pemba Chhring Tamang watched the landscape he had known all his life disappear.

The footage was horrific: a massive wave of ice, mud and floodwater smashing into buildings on the border between China and Nepal with devastating force, sweeping away bridges and…

A glacier fell across the China-Nepal border. The flood crossed three countries. But South Asian countries’ responses to natural disasters are limited by borders and politics.

The August 26 disaster, triggered by a glacier collapse, has killed hundreds of people and left thousands missing, including hundreds of Indians, on Nepal-China border.

Melting glaciers and devastating floods are hitting the Himalayas.