Guwahati, Aug. 30 -- Joydeep Gupta

An entire mountainside of ice and rock fell into the Lhende Khola river on the Tibet-Nepal border, on the morning of August 26, triggering an earthquake and a flood that rose nine metres, killing hundreds, sweeping away at least six dams and hydropower stations, over a dozen crucial bridges, homes, roads and even a herd of elephants all the way downriver to India.

There was no rain, just the excessive heat caused by climate change that loosened the ice from the side of the 7,245-metre-high Langtang Lirung peak, till the entire mountainside, including a glacier clinging to it, collapsed into the river flowing some 3,000 metres below. There was no time for any "early" warning as the resultant wall of wat...