Turtle rescues happen every year in late fall in the Northeast, but for reasons not yet known what's happening this year is "epic," said one of the nearly two dozen volunteers passing boxes of turtles like a bucket brigade.

"Statistically, I feel like we are out on Pluto," said Tony LaCasse, spokesman for the New England Aquarium's marine-animal hospital in Quincy, Mass., who fears the number of cold-stunned turtles could quadruple.

"We've been rescuing sea turtles for 25 years, and we are just absolutely shocked," LaCasse said.