The California Public Utilities Commission (CPUC) provides a High Fire Threat District (HFTD) map to identify areas with elevated or extreme wildfire risks. 

This map is used by utility companies, such as PG&E, to determine eligibility for certain safety programs, including portable backup battery programs.

About the Map:

The CPUC High Fire-Threat District Map includes three fire-threat areas:

• Zone 1: Tier 1 High-Hazard Zones (HHZs) identified by the U.S. Forest Service (USFS) and CAL FIRE. These zones are near communities, roads, and utility lines and pose a direct threat to public safety.
• Tier 2: Areas with elevated wildfire risk from overhead utility power lines and facilities.
• Tier 3: Areas with extreme wildfire risk, where the highest likelihood of fire initiation and growth exists. This tier requires the most stringent utility regulations to reduce fire risks.

Most of Nevada County and Placer County are designated as Tier 2 or Tier 3.

Web pages

• High Fire Threat District (HFTD) Map - https://capuc.maps.arcgis.com/apps/webappviewer/index.html?id=5bdb921d747a46929d9f00dbdb6d0fa2