Sierraville, CA
How exposed is Sierraville to wildfire?
Sierraville's 293 buildings earn a 99th-percentile wildfire-risk score nationally under USFS's model — in USFS's highest wildfire-risk band nationally. (Source: USFS's Wildfire Risk to Communities methodology.)
USFS's separate burn-probability score — fire likelihood alone, before counting what's built there — puts Sierraville at the 99th percentile, close to its 99th-percentile risk score.
Sierraville's building exposure, zone by zone
Direct exposure dominates in Sierraville: 100% of its 293 buildings, versus 0% Indirect and 0% Minimal. Clearing space around a structure changes the outcome here more than any single building-material swap.
Sierraville against the rest of the country
Sierraville scores 99th nationally and 89th within California — close enough that its state context doesn't change the picture the national number already gives. Among the 31,521 US communities USFS scores, Sierraville ranks 344 for wildfire risk (1 is highest) and 21,809 by building count (1 is largest). Within California alone, it ranks 173 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Shopping for coverage in Sierraville
Because Sierraville is in California, a wildfire-hazard disclosure is legally required before a sale closes here — unusual nationally, since only these two states mandate it. The state's FAIR Plan alone carried 668,609 policies by the end of 2025. Full detail in the disclosure-law guide.
Hardening a home in Sierraville
Because Direct exposure dominates in Sierraville (100%), the highest-leverage fix is defensible space, not roofing or vents alone — covered in the home-hardening guide.
More on how this number was built
The methodology guide shows exactly how USFS turned 293 counted buildings into the percentiles shown above for Sierraville. For more on what direct exposure implies beyond Sierraville, see the exposure-zones guide.