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A torrent of water, mud and boulders came down the Mandakini valley, flattening the shrine town and wiping out the Rambara halt on the trekking route during peak pilgrimage season. The temple itself largely survived, partly because a huge boulder lodged behind it and split the flow, while thousands of pilgrims, porters and residents were killed or never found.
The flood's lethality came less from rainfall than from where people had built: hotels, lodges and shops sat on old debris fans and flood channels of the Mandakini. When a large flow arrived, the river returned to the paths it had used before and destroyed whatever stood in them. The book treats the disaster as a collision between normal geomorphology and unchecked construction, not a random act of nature.
In a remote mountain disaster, organised state rescue arrives days late because roads, bridges and communications are gone. For that stretch, survival depends on local people who are often survivors themselves: porters, mule handlers, priests and villagers who know the terrain. Reconstructing a disaster through these first rescuers shows the real response timeline, and it contrasts with the official account, which begins when helicopters land.
A natural hazard becomes a mass-casualty event when it strikes a place whose population has temporarily swelled far beyond its capacity. Warnings of heavy rain did not stop the yatra, so the number of people in harm's way was set by tourism policy rather than by the weather.