A massive flash flood triggered by a landslide at the Tibet-China border killed over 100 people [2] in northern Nepal's Rasuwa district.

The disaster underscores the extreme vulnerability of Himalayan river valleys to sudden geological shifts, threatening both local residents and the thousands of international tourists who visit the region.

The flood, described as a "Himalayan tsunami," occurred in late May 2024 [2]. A sudden landslide in Tibet caused a breach that released a massive volume of water into Nepalese rivers, specifically impacting the Bhote Koshi and Trishuli river valleys [1, 2].

Casualty reports vary across sources. One report indicates 95 people died [1], while another states the death toll is over 100 [2]. Additionally, more than 400 people remain missing [2]. The victims include local residents of the Rasuwa district, as well as Indian pilgrims, and tourists [1, 2].

Rescue operations involve agencies from both Nepal and India [1, 2]. The scale of the destruction was exacerbated by the speed of the water release, which left residents with little time to evacuate the river valleys.

The event highlights the ongoing risks associated with glacial lake outbursts and landslide-induced breaches in the high-altitude borders of Tibet and Nepal. These events often occur without warning, turning riverbeds into corridors of destruction within minutes.

A massive flash flood triggered by a landslide at the Tibet-China border killed over 100 people

This disaster demonstrates the transboundary nature of Himalayan environmental risks, where a geological event in Tibet can cause catastrophic loss of life in Nepal. The high death toll and number of missing persons reflect a lack of early warning systems capable of detecting border-region breaches in real-time, leaving downstream communities and tourists exposed to sudden, high-volume water surges.