IMPORTANT INFORMATION
***Check Fire Potential Index Ratings
before going out to the field. ***
The FPI is a forecast describing the potential for fires to ignite and spread on a scale from R1 (lowest) to R5 (highest) specific to each FPI Rating Area.
R5-Plus indicates there is elevated fire potential PLUS the potential for wind-related outage activity, which may warrant a Public Safety Power Shutoff (PSPS) event. The FPI model was calibrated using a high-resolution dataset of historical weather, fuel conditions, geographic features, and fires.
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 using some equipment and open flames are 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).
Working Fire Watch A crew member responsible for fire detection, risk mitigation, and total situational awareness while work is being performed in addition to normal assigned work duties. This crew member is also responsible to help extinguish fires and stop work, when required, due to safety hazards.
It is the responsibility of any person in charge of personnel working in an FPI Rating Area to be aware of changing local meteorological conditions. The person in charge must also be aware of the possibility of increased fire potential during the time work is in progress.
For Fire Precautions and Restrictions in Hazardous FPI Rating Areas: Review PG&E Standard: TD-1464S
See attached images for the FPI ratings for today and a preview of ratings for tomorrow and the day after tomorrow. A Google Earth-compatible KMZ file of today's ratings is also attached. Google Earth can be obtained from the PG&E IT store or from the Apple app store at no cost.