Natural phenomena

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Across
  1. 3. a large, destructive fire that spreads quickly over woodland
  2. 8. a violent atmospheric disturbance in which the air is highly charged with static electricity, causing a storm.
  3. 9. a mass of mud and other earthy material that is falling or has fallen down a hillside or other slope.
Down
  1. 1. a mobile, destructive vortex of violently rotating winds having the appearance of a funnel-shaped cloud and advancing beneath a large storm system
  2. 2. a widespread occurrence of an infectious disease in a community at a particular time.
  3. 4. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.
  4. 5. a storm with a violent wind, in particular a tropical cyclone in the Caribbean.
  5. 6. a long high sea wave caused by an earthquake, submarine landslide, or other disturbance.
  6. 7. an overflowing of a large amount of water beyond its normal confines, especially over what is normally dry land.