Rialto, CA
Rialto wildfire risk explained
USFS's Wildfire Risk to Communities model puts Rialto at the 96th national percentile for risk to structures, in USFS's highest wildfire-risk band nationally — a score built from 26,902 actual buildings. (Source: USFS's Wildfire Risk to Communities methodology.)
Fire likelihood alone (USFS's burn-probability figure) ranks Rialto at the 95th national percentile — 1 points below its risk-to-structures score, a gap driven by how much is actually built there.
Where Rialto's buildings actually sit
Rialto rates 73% Minimal exposure against just 1.5% Direct and 25.5% Indirect — of 26,902 buildings counted, few sit close enough to burnable vegetation for USFS to flag them individually. At 26,902 buildings, this is a substantial built environment, so the shares below describe a real population of structures, not a handful of edge cases.
Rialto against the rest of the country
Rialto's 96th national percentile looks worse in isolation than its 78th ranking inside California does — this place is on the milder end for its own state, by 18 points. Among the 31,521 US communities USFS scores, Rialto ranks 1,127 for wildfire risk (1 is highest) and 458 by building count (1 is largest). Within California alone, it ranks 350 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Shopping for coverage in Rialto
Rialto's 96th-percentile score lands in California, the only two states requiring a wildfire disclosure at sale. California's surplus-lines homeowners market passed 300,000 policies for the first time in 2025, driven by carriers pulling back from wildfire-exposed areas statewide. The disclosure-law guide covers what it requires.
Hardening a home in Rialto
Rialto's 73% Minimal-exposure share means structure-level hardening matters less here than it would elsewhere — still worth the low-cost basics, per the home-hardening guide.
More on how this number was built
Rialto's 96th-percentile score and its burn-probability figure both come from the same USFS workbook, documented in the methodology guide. For more on what minimal exposure implies beyond Rialto, see the exposure-zones guide.