A day before a wall of ice, rock and muddy water tore through Himalayan valleys along the Nepal-China border, Dipesh Chapagain was discussing with a colleague just how devastating such a disaster could be.

Some analysts have linked a series of recent floods and landslides to climate change

The deadly flash floods that tore through Nepal’s Himalayan border region on Wednesday may have been triggered by a massive chunk of glacier breaking away high in the mountains…