Rescuers in northern India were working Monday to rescue more than three dozen power plant workers trapped in a tunnel after part of a Himalayan glacier broke off and sent a wall of water and debris rushing down the mountain in a disaster that has left 18 people dead and 165 missing.

Indian rescue crews struggled to reach trapped victims Sunday after part of a glacier in the Himalayas broke off and released a torrent of water and debris that slammed into two hydroelectric plants. At least nine people were killed and 140 were missing in a disaster experts said appeared to point to global warming.