'there are no stacks Or stooks that can be lost. Nor are there trees Which might prove company when it blows full Blast:'
The speaker acknowledges the power of nature and the dangerous potential it possesses, but is quite confident that these hazards do not affect him and his community.
“Wizened” and the fact that there are “no stacks or stooks” or “trees” make the island seem quite barren and desolate. The speaker is under the impression that the island has nothing to offer the storm in terms of a sacrifice, so they are exempt from attack.