Nepali rescuers trying to reach hydropower workers believed trapped in tunnels swamped by flood debris deployed heavy machinery on Sunday, after rain and rising river waters hampered earlier efforts.

Nepal’s army rescues hundreds from a flooded hydropower tunnel as more than 1,500 remain missing, while the Nepali diaspora holds vigils in New York.

Rescue teams using heavy machinery are digging through mud and debris in Nepalese towns devastated by a flash flood two days ago, as hopes of finding survivors fade and officials…