Original: The hurricane devastated the islands of Niihau, Kauai, and Oahu with wind gusts exceeding 100 mph (160 km\/h) and rough seas exceeding 30 feet (9 m) in height.
Simplified: The storm caused very bad damage on the islands of Niihau, Kauai, and Oahu. Some wind gusts reached 100 mph (160 km\/h), and waves were over 30 feet (9 m) high.