Wildfires and forest fires

1234567
Across
  1. 2. The gray or black product of burning visible in the air.
  2. 3. Something that catches fire easily.
  3. 4. Fire that occurs in a wooded area.
  4. 6. An obstacle to the spreading of fire.
Down
  1. 1. Very high temperature.
  2. 2. Small fiery particle from a fire.
  3. 3. Person responsible for fire suppression.
  4. 5. Start to burn.
  5. 7. Injury caused by heat.