Natural disasters for class

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Across
  1. 5. A destructive vortex of rotating wind
  2. 6. When a large area burns and spreads quickly
  3. 7. The place, where most natural disasters seem to take place on NE
  4. 8. A giant wave
Down
  1. 1. When an area doesn't get enough water and dry up
  2. 2. A mountain or hill, which periodically spews lava or other dangerous hot material
  3. 3. When the ground shakes due to the tectonic plates
  4. 4. When in infectious disease is spread across a large area