DEAR DEAR ENVIRONMENT!

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Across
  1. 3. prediction
  2. 6. the opposite for hilly or steep
  3. 7. suddenly
  4. 10. what you do when a person insults you
  5. 13. it means that something in unexplained
  6. 14. the opposite for flood
  7. 15. disgrace
  8. 17. to appear all of a sudden
Down
  1. 1. to rain cats and dogs
  2. 2. to vanish forever
  3. 4. a serious murder
  4. 5. a synonym for use or employ
  5. 8. reduce
  6. 9. an expression which means Good luck
  7. 11. to be Good at gardening
  8. 12. when it rains there are many
  9. 16. when you constantly have bad luck