Sentence:  While accounts of the progress of the <WSD>tsunami</WSD> came in from various points in the Pacific ( Midway reported it was covered with nine feet of water ) , the Hawaiian station made its calculations and notified the military services and the police that the first big wave would arrive at Honolulu at 23 : 30 Greenwich time . 
Meaning of the word marked with <WSD> tags:  a cataclysm resulting from a destructive sea wave caused by an earthquake or volcanic eruption