This is not a Natural Hazard Disclosure statement. Open state data, explained; flood and dam zones are not covered. Details
Is Janesville in a fire hazard severity zone?
53.5% of Janesville is mapped in a fire hazard severity zone, and 49.6% in High or Very High, where the seller disclosures apply.
Janesville ranks 572 of 1050 California places for the share of land in High or Very High zones.
In land area, that is 7.04 sq mi Very High, 9.75 sq mi High, 1.30 sq mi Moderate, out of 33.81 sq mi. Its High and Very High share of 49.6% is 17.6 points above the 32.0% of Lassen County. The median home value of $289,400 is 12% above the county median of $259,500. Among 16 places in the county it ranks 7 for exposure; Clear Creek ranks first at 100.0%. The latest recorded fire is BYERS in 2025. By decade: 1970s: 1, 1980s: 1, 1990s: 1, 2000s: 1, 2010s: 2, 2020s: 2. The state has not evaluated Janesville for liquefaction or landslides, so the absence of a seismic hazard zone proves nothing.
Zones differ from street to street: check the address above. In Lassen County overall, 14.1% of the land is Very High.
Fires recorded in or across Janesville
The state record shows 8 since 1950. The largest was DIXIE in 2021 (963,405 acres in total).
- BYERS (2025), 105 acres
- DIXIE (2021), 963,405 acres
- HYATT (2018), 432 acres
- SUNNYSIDE (2010), 231 acres
- A-3 (2003), 1,051 acres
- BYERS (1996), 1,019 acres
- BASS (1985), 2,382 acres
- SUNNYSIDE DUMP #3 (1973), 641 acres
Earthquake fault zone maps
Janesville touches the Standish map.
Nearby places compared
- Johnstonville, 6.9 mi northwest: 41.3% High or Very High, 3 fires, median home $278,900
- Susanville, 7.3 mi north: 36.2% High or Very High, 2 fires, median home $234,000
- Litchfield, 8.7 mi northeast: 16.7% High or Very High, 4 fires, median home $332,800
- Milford, 11.3 mi southeast: 37.4% High or Very High, 2 fires
- Patton Village, 20.1 mi southeast: 72.5% High or Very High, 0 fires, median home $72,200
- Herlong, 21.6 mi southeast: 47.6% High or Very High, 0 fires
- Taylorsville, 24.2 mi southwest: 26.7% High or Very High, 2 fires
- Crescent Mills, 25.9 mi southwest: 74.7% High or Very High, 2 fires
- Greenville, 26.4 mi southwest: 68.8% High or Very High, 1 fire, median home $353,900
- Westwood, 27.0 mi west: 100.0% High or Very High, 1 fire, median home $176,500
- Doyle, 27.5 mi southeast: 84.4% High or Very High, 7 fires, median home $227,300
- Spaulding, 29.3 mi northwest: 31.4% High or Very High, 2 fires, median home $219,200