#inundation__flood__deluge__alluvion  the rising of a body of water and its overflowing onto normally dry land
  supertype:  #geological_phenomenon  a natural phenomenon involving the structure or composition of the earth
  subtype:  #debacle  flooding caused by a tumultuous breakup of ice in a river during the spring or summer
  subtype:  #flash_flood__flashflood  a sudden local flood of great volume and short duration
     subtype:  #floodhead  a wall of water rushing ahead of the flood; "we were lucky to be safe when the floodheads hit"

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