Hundreds of thousands still at risk of climate-linked floods in Nepal

Key Points:

• Researchers estimate that around 294,000 people live downstream in Nepal's high mountain basins, exposed to potentially catastrophic flood risks exacerbated by climate change and glacial meltwater.
• The August disaster caused by a massive rock and ice avalanche on Langtang Lirung peak resulted in at least 1,455 deaths and over 5,285 missing persons, highlighting the dangers along main trade routes and tourist areas near river channels.
• About 108,000 people live downstream of glacial lakes that pose risks of sudden water releases due to ice dam failures, emphasizing the urgent need for improved early warning systems and land use zoning.
• The study, published in Scientific Reports, used river mapping within 50 kilometers downstream of glacial lakes and headwaters to identify flood exposure, serving as an initial assessment requiring further detailed analysis.
• Researchers hope this recent disaster serves as a wake-up call for Nepal to enhance disaster preparedness and manage development near hazardous river channels to reduce future flood risks.