Zone (FWI map color code) | Mean FWI | Percent days by fire behavior and map fire zone | |||||||
---|---|---|---|---|---|---|---|---|---|
No fire | Smoldering | Light surface | Moderate surface | Hot surface | Torching | Crown fire | Conflagration | ||
1- Minimal (blue green) | 0–2 | 65 | 34 | 1 | |||||
2- Very low (dark green) | 2–4 | 40 | 50 | 7 | 3 | ||||
3- Low (light green) | 4–6 | 31 | 44 | 15 | 5 | 4 | 1 | ||
4- Moderate (yellow) | 6–10 | 20 | 40 | 20 | 10 | 7 | 2 | 1 | |
5- High (orange) | 10–14 | 15 | 40 | 10 | 15 | 10 | 7 | 2 | 1 |
6- Very high (light red) | 14–20 | 5 | 30 | 10 | 20 | 15 | 15 | 3 | 2 |
7- Extreme (red) | 20+ | 25 | 7 | 10 | 13 | 20 | 15 | 10 |