Most wharfs on the eastern side of Cape Sable Island are under water and Route 330 is impassable as a result.
Dick Crowell, emergency measures co-ordinator in Barrington, said about a metre of water is covering the highway.
"There was a roof on one of the older homes lying in the middle of the road in Clark's Harbour. I believe that's been cleared up. There are lots of lines down. There are trees that are down and one of the fish plants has about three feet of water all around it," he said.
"There are several derelict vessels that have broken loose and are now coming ashore near the roads."
There are more than 1600 customers in the Barrington area without power.