Nepal floods 'unprecedented', requires new 'engineering approaches, risk-sensitive urban planning'

Nepal is facing a humanitarian crisis following catastrophic floods and avalanches. With nearly 4,300 people missing and at least 900 dead, rescue efforts are focusing on trapped hydroelectric workers. Experts emphasize the need for science-based risk reduction, improved early warning systems, and \"building back better\" to mitigate future disasters in the Himalayas.