Important Documents:
Utility Fire Potential Index (FPI) Rating:
A rating to determine the risk of fire and its likely behavior. Its calculation and scale from “R1” to “R5-Plus” considers fuel moisture, humidity, wind speed, air temperature, and historical fire occurrence. These ratings are as follows:
- R1: Very little or no fire danger.
- R2: Moderate fire danger.
- R3: Fire danger is so high that care must be taken using fire-starting equipment. Local conditions may limit the use of machinery and equipment to certain hours of the day.
- R4: Fire danger is critical. Using equipment and open flames is limited to specific areas and times.
- R5: Fire danger is so critical that the using some equipment and open flames is not allowed in certain areas.
- R5-Plus: The greatest level of fire danger where rapidly moving, catastrophic wildfires are possible. This is typically when fire danger is R5, “plus” there are high-risk weather triggers (e.g., strong winds).