29/08/2026
𝐖𝐡𝐞𝐧 𝐭𝐡𝐞 𝐦𝐨𝐮𝐧𝐭𝐚𝐢𝐧𝐬 𝐬𝐩𝐞𝐚𝐤 𝐭𝐰𝐢𝐜𝐞, 𝐰𝐞 𝐦𝐮𝐬𝐭 𝐥𝐢𝐬𝐭𝐞𝐧.
In July 2025, a glacial lake outburst flood (GLOF) from a supraglacial lake on the Purepu Glacier swept down the Trishuli River and struck the Rasuwagadhi border crossing between Nepal and China. Nine people were killed, dozens went missing. The Miteri Bridge, Nepal's primary gateway for cross-border trade with China, was destroyed. Four hydropower projects were damaged, taking 8% of Nepal's generation capacity offline. Hundreds of vehicles and cargo containers were buried in mud. Cross-border commerce came to a halt.
Scientists confirmed the cause within days. A rapid hazard assessment by Qiao Liu, Amrit Thapa and Jakob Steiner, published through the HiRISK collective, was among the first formal scientific analyses released.
𝐓𝐡𝐢𝐫𝐭𝐞𝐞𝐧 𝐦𝐨𝐧𝐭𝐡𝐬 𝐥𝐚𝐭𝐞𝐫, 𝐨𝐧 𝐭𝐡𝐞 𝐦𝐨𝐫𝐧𝐢𝐧𝐠 𝐨𝐟 𝟐𝟔 𝐀𝐮𝐠𝐮𝐬𝐭 𝟐𝟎𝟐𝟔, 𝐭𝐡𝐞 𝐬𝐚𝐦𝐞 𝐯𝐚𝐥𝐥𝐞𝐲 𝐰𝐚𝐬 𝐡𝐢𝐭 𝐚𝐠𝐚𝐢𝐧 — 𝐭𝐡𝐢𝐬 𝐭𝐢𝐦𝐞 𝐚𝐭 𝐚 𝐬𝐜𝐚𝐥𝐞 𝐧𝐨 𝐨𝐧𝐞 𝐡𝐚𝐝 𝐩𝐫𝐞𝐩𝐚𝐫𝐞𝐝 𝐟𝐨𝐫. An ice-rock avalanche in the Langtang region sent a wall of water, ice and debris thundering down the Lhende Khola and into the Trishuli river system at speeds of up to 108 km/h. The flood wave travelled 168 km. Nearly 600 are confirmed dead. Nearly 2,000 are still missing. Over 40 km of highway were damaged. Twelve hydropower facilities were damaged, removing 431 MW from the national grid, with a further 470 MW of projects under construction also impacted. The Rasuwagadhi customs post, only recently rebuilt, was destroyed once more.
Two days after the flood, AMAA members Abiral Khatri (economist), Dr Austin Lord (anthropologist), and Narayan Thapa (geospatial scientist), working within the 𝐓𝐡𝐞𝐦𝐚𝐭𝐢𝐜 𝐖𝐨𝐫𝐤𝐢𝐧𝐠 𝐆𝐫𝐨𝐮𝐩 𝐨𝐧 𝐇𝐢𝐠𝐡 𝐌𝐨𝐮𝐧𝐭𝐚𝐢𝐧 𝐨𝐟 𝐀𝐬𝐢𝐚 𝐃𝐚𝐭𝐚 𝐜𝐨-𝐥𝐞𝐝 𝐛𝐲 𝐃𝐫 𝐉𝐚𝐤𝐨𝐛 𝐒𝐭𝐞𝐢𝐧𝐞𝐫 (hydrologist) together with colleagues from Canada, China, and Netherlands, released a new Rapid Risk Assessment — written also in Nepali — to put concise, evidence-based scientific knowledge directly into the hands of Nepal's policymakers, disaster responders, journalists and affected communities.
This is what AMAA does. Our members — in Nepal and across the world — are working around the clock, drawing on satellite imagery including open-access Landsat and Sentinel data, alongside commercial Planet imagery accessed for rapid disaster response, as well as seismic records and ground-level observations. 𝐎𝐩𝐞𝐧 𝐬𝐜𝐢𝐞𝐧𝐜𝐞 𝐟𝐨𝐫 𝐨𝐩𝐞𝐧 𝐞𝐦𝐞𝐫𝐠𝐞𝐧𝐜𝐢𝐞𝐬.
When the same place is struck by catastrophic mountain hazards twice in just over a year, the message is unmistakable: 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞-𝐛𝐚𝐬𝐞𝐝 𝐝𝐞𝐜𝐢𝐬𝐢𝐨𝐧𝐬 𝐚𝐧𝐝 𝐩𝐫𝐞𝐩𝐚𝐫𝐞𝐝𝐧𝐞𝐬𝐬 𝐚𝐫𝐞 𝐧𝐨𝐭 𝐨𝐩𝐭𝐢𝐨𝐧𝐚𝐥. 𝐓𝐡𝐞𝐲 𝐚𝐫𝐞 𝐭𝐡𝐞 𝐨𝐧𝐥𝐲 𝐰𝐚𝐲 𝐟𝐨𝐫𝐰𝐚𝐫𝐝.
But scientific data alone is not enough. As Dr Jakob Steiner has consistently argued — including in "Asking those who feel it," a course on indigenous knowledge and climate risks he co-teaches with Solmaz Mohadjer at the University of Tübingen — we must listen to the local people. The Indigenous communities who have lived in these mountains for centuries are their true custodians. 𝐓𝐡𝐞𝐢𝐫 𝐤𝐧𝐨𝐰𝐥𝐞𝐝𝐠𝐞 𝐨𝐟 𝐭𝐡𝐞 𝐥𝐚𝐧𝐝, 𝐨𝐟 𝐬𝐡𝐢𝐟𝐭𝐢𝐧𝐠 𝐠𝐥𝐚𝐜𝐢𝐞𝐫𝐬, 𝐨𝐟 𝐫𝐢𝐯𝐞𝐫𝐬 𝐭𝐡𝐚𝐭 𝐫𝐮𝐧 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭𝐥𝐲 𝐛𝐞𝐟𝐨𝐫𝐞 𝐚 𝐟𝐥𝐨𝐨𝐝 — 𝐭𝐡𝐢𝐬 𝐢𝐬 𝐢𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐜𝐞 𝐭𝐡𝐚𝐭 𝐧𝐨 𝐬𝐚𝐭𝐞𝐥𝐥𝐢𝐭𝐞 𝐚𝐥𝐨𝐧𝐞 𝐜𝐚𝐧 𝐩𝐫𝐨𝐯𝐢𝐝𝐞.
Mountain science and mountain people must work together.
🔗 Read the Rapid Risk Assessment (नेपाली):https://hirisk.org/wp-content/uploads/2026/08/RHA_NP3_RasuwaFlood-1.pdf
🎥 Watch Dr Steiner on the satellite evidence: https://www.youtube.com/watch?v=qa6xLsJLFnc
Mountain Partnership
Jakob Steiner, a geoscientist at the University of Graz in Australi...