01-1-S190-EP

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• Unit 1 - Basic Concepts
• of Wildland Fire

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Unit Objective

• Define basic terminology used in wildland fire.

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Parts of a Fire
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Origin
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Head
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Flank (Flanks)
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Rear or Heel
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Perimeter
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Finger
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Pocket
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Island
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Spot Fire
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Head

• Left Flank

• Right Flank

Rear or Heel

• Origin

Which flank is more active?
Where would you start to fight this fire?
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What are these two fire parts called?
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Fire Behavior Terms
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Smoldering

• Fire burning without flame and barely spreading.

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Creeping

• Fire burning with a low flame and spreading
  slowly.

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Running

• Fire spread rapidly with a well defined head.

Click on image to play video
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Spotting

• Fire producing sparks or embers that are carried
  by the wind or convection that start new fires
  beyond the main fire

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Torching
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Crowning

• Fire advances from top-to-top of trees or shrubs
  more or less independently of the surface fire.

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Flare up

• Sudden acceleration of fire spread or intensity,
  but of relatively short duration.

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Firewhirl
A spinning, moving column of ascending air rising
within a vortex and carrying aloft smoke, debris,
and flames.
Click on image to play video
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What type of fire behavior is this?
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What type of fire behavior is this?
Click on image to play video
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Other useful firefighting terms

• Anchor point
• Control line
• Fireline
• Mop-up
• Contained
• Controlled
• L.C.E.S.