Wildfire Rating And Ranking Systems
CFFDRS (The Canadian Forest Fire Danger Rating System)
Developed in Canada using empirical data.
Adapted for use in many other countries.
Takes weather readings and tracks moisture content of forest fuels.
Wildland firefighters should have basic understanding what numbers represent.
Fire Intensity Ranking System
RANK 1: ground fire or creeping surface fire.
RANK 2: low vigor surface fire
RANK 3: moderate vigor surface fire
RANK 4: high vigor surface with candling
RANK 5: extreme surface or continuous crown fire
RANK 6: extreme crown fire
NOTE: Wildland firefighter with handtools or water delivery systems are only effective up to the lower end of Rank 4. Beyond this is UNSAFE and INEFFECTIVE