At least one expert said the students' invention could help rescuers during mass dolphin strandings in Cape Cod Bay, an annual problem.

One of the most beautiful nights we’ve ever had. And I’m just glad that they had that before they passed away,” she said, remembering the night before the flood.

Fire Department Chief Ronnie Villanueva said the workers had to make it through the most treacherous part themselves, climbing over more than 12 feet (3.6 meters) of loose dirt before rescuers could ...