Burning Index 

  1. An estimate of the potential difficulty of fire containment as it relates to the flame length at the head of the fire.
  2. A relative number related to the contribution that fire behavior makes to the amount or effort needed to contain a fire in a specified fuel type. Doubling the burning index indicates that twice the effort will be required to contain a fire in that fuel type as was previously required, providing all other parameters are held constant. 
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