The Mountain That Moved: Nepal's August Flood and the Question Hanging Over the Himalayas
At 8:37 on the morning of August 26, 2026, seismographs around the world twitched. The signal — energy equivalent to a magnitude-5.2 earthquake — was not an earthquake. High on the Nepal–Tibet border, near the Langtang Lirung massif, an enormous chunk of glacier had sheared off the mountain, likely together with the slope beneath it, and plunged into the valley of the Lhende Khola, a small tributary that feeds the Bhote Koshi river as it knifes from Tibet into Nepal. The force of the fall melted ice on impact, tore up waterlogged sediment and boulders, and sent what one scientist called "liquid concrete" — a torrent estimated at half a million dump-truck loads of rock, ice and water — thundering down gorges toward sleeping valleys. In places, rivers rose nine metres in thirty minutes. Researchers suspect the debris briefly dammed the river before the impounded water burst through, magnifying the wave. What followed was one of the deadliest Himalayan disasters in living memor...