Natural disaster

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Across
  1. 4. a movement of air going upwards
  2. 5. a violent storm with very strong winds that move in a circle. There is often also a long cloud that is narrower at the bottom than the top.
  3. 6. a long channel dug at the side of a field or road, to hold or take away water
Down
  1. 1. to become flat or flatter; to make something flat or flatter
  2. 2. the length of time that something lasts or continue
  3. 3. a room or rooms in a building, partly or completely below the level of the ground
  4. 4. to pull a tree, plant, etc. out of the ground