Children are carried to a rescue helicopter by military personnel in the disaster-stricken Rasuwa district near Nepal’s border with Tibet, on Thursday, Aug. 27, 2026. Emergency workers and helicopters scoured steep Himalayan valleys on Thursday in a desperate search for survivors after a torrent of water, mud and ice killed hundreds — and perhaps many more — as it swept through a river valley that runs through Tibet and Nepal. More than 1,400 people are still missing. (Atul Loke/The New York…