Though the only reported casualties across the Aleutian Islands were sheep, the tsunami did generate some impressive wave heights, as shown on the map above (black triangles). Eight-foot waves struck at Adak Island. The tsunami destroyed houses and boats at the harbor of Atka Island. Wave heights reached 40 feet near the Scotch Cap Lighthouse at Unimak Island, and were reportedly up to 75 feet high on the Pacific side of Umnak Island. As was the case with tsunami of 1946, the Aleutian Islands shielded the Alaskan mainland from the effects of the tsunami.