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[INTERNATIONAL] · Nepal, Bhutan, India, China · 9 sources

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Part of situation: Glacial melting and surge risks in High Mountain Asia (6 clusters)

Himalayan flood risks rise amid rapid urbanization and glacial instability

Himalayan flash floods glacial lake outburst floods climate change adaptation Nepal floods Bhutan hydropower

Recent flash floods in Nepal's Gorkha district, triggered by an avalanche-induced blockage or landslide dam breach, destroyed over 35 homes and bridges along the Budhi Gandaki River. This disaster has prompted climate advocates to demand that the upcoming COP31 be a ‘Nepal COP,’ focusing on climate finance and loss and damage for vulnerable nations.

A study published in Scientific Reports highlights a growing vulnerability in Himalayan valley floors. Between 2016 and 2023, built-up surfaces in these basins increased by approximately 46%. Currently, roughly 293,800 people—about 18% of the population in basins under 1,361 glacial lakes—live on terrain with less than 50 meters of elevation above the nearest watercourse, significantly increasing exposure to flood risks.

In Bhutan, glaciologists are testing technology to drain the Thorthormi glacial lake to mitigate the risk of a glacial lake outburst flood (GLOF). Such an event poses a direct threat to major hydropower infrastructure, including the Punatsangchhu-II and Punatsangchhu-I projects.

Entities

Bhote Koshi River · Bhutan · COP31 · International Centre for Integrated Mountain Development · Kanchenjunga Conservation Area · Karma Toeb · Langtang National Park · Nepal · Scientific Reports · Trishuli River

Claims

What the coverage asserts, and how many sources carry each claim.

  • [○ 1 SOURCE] A flash flood in Nepal's Gorkha district destroyed over 35 homes and bridges. www.insightsonindia.com
  • [○ 1 SOURCE] Climate advocates are demanding that COP31 prioritize Nepal's flood disaster. myrepublica.nagariknetwork.com
  • [○ 1 SOURCE] Bhutan is testing technology to drain the Thorthormi glacial lake to reduce flood risks. www.eco-business.com
  • [○ 1 SOURCE] Built-up surfaces in Himalayan basins increased by approximately 46% between 2016 and 2023. www.imep-cnrs.com
  • [○ 1 SOURCE] Approximately 293,800 people, or 18% of the population in specific Himalayan basins, live on terrain with less than 50 meters of elevation above the nearest watercourse. www.imep-cnrs.com

Sources

Crece la exposición a inundaciones en el Himalaya [ciencias.uy]
Unas 300. 000 personas viven en zonas del Himalaya con riesgo de riadas como la que arrasó Nepal [bloglemu.blogspot.com]
Pourquoi les fonds de vallée himalayens sont de plus en plus exposés [www.imep-cnrs.com]
UPESC CURRENT AFFAIRS – 12 OCTOBER 2026 [www.insightsonindia.com]
Climate advocates demand action after deadly floods [myrepublica.nagariknetwork.com]
Ticking Time Bombs of Ice: The Silent Cataclysm Looming in the High Himalayas [www.wazzuppilipinas.com]
URBANISMO / Casi 300. 000 personas viven en zonas expuestas a inundaciones en el Himalaya [www.informacion.es]
The growing Himalayan risks in Bhutan’s hydropower ties with India [www.eco-business.com]
Growing Dangers of a Warming Himalaya [www.millenniumpost.in]