Lower stories of a large commercial concrete building stand completely filled with flood silt and mud along the banks of the raging Trishuli River, with hydropower penstock pipes and an electrical transmission tower visible in the background in Trishuli, Nuwakot District, Nepal, on August 31, 2026. A catastrophic flash flood and debris flow, triggered by an upstream glacial collapse and heavy monsoon rainfall, elevated the riverbed, eroded shoreline embankments, and caused widespread structural destruction to riverside infrastructure and settlements across the Trishuli basin.
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