Sentence:  So [after the tsunami], once again Hideaki navigated his way through the <WSD>Atlantean</WSD> city, picking his way through crumbling wreckage, splintered wood, and shredded metal to find his elderly mother. 
Meaning of the word marked with <WSD> tags:  flooded or submerged, especially in case of a natural disaster, reminiscent of the way Atlantis sank into the ocean