Diablo, CA
Diablo wildfire risk explained
Diablo's 649 buildings earn a 97th-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 Diablo at the 97th percentile, close to its 97th-percentile risk score.
What "at risk" means for the buildings here
649 buildings are counted in Diablo, and 68% of them sit in USFS's Direct exposure zone — flame contact, not just ember cast, is the live possibility for most of them, against 0% rated Minimal.
How Diablo compares
Diablo ranks lower within California (78th percentile statewide) than its 97th national percentile suggests alone — a calmer spot in a state where wildfire risk generally runs high. Among the 31,521 US communities USFS scores, Diablo ranks 1,062 for wildfire risk (1 is highest) and 15,207 by building count (1 is largest). Within California alone, it ranks 339 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Shopping for coverage in Diablo
Because Diablo 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 Diablo
Diablo's 68% Direct-exposure share means lot clearing around the structure typically outweighs any single material upgrade here. The home-hardening guide ranks the options for a place shaped like this.
More on how this number was built
Diablo's 97th-percentile score and its burn-probability figure both come from the same USFS workbook, documented in the methodology guide. For more on what direct exposure implies beyond Diablo, see the exposure-zones guide.