Rio Vista, CA
How exposed is Rio Vista to wildfire?
Rio Vista's 5,429 buildings earn a 88th-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.)
Separately from the risk score above, Rio Vista's burn probability — fire likelihood with no building count factored in — sits at the 89th percentile nationally.
Where Rio Vista's buildings actually sit
5,429 buildings are counted in Rio Vista, and 88.5% of them are Indirect exposure — ember-driven risk rather than the 9.1% in Direct exposure or the 2.4% rated Minimal. At 5,429 buildings, this is a substantial built environment, so the shares below describe a real population of structures, not a handful of edge cases.
Where Rio Vista ranks
Inside California, Rio Vista sits at just the 57th percentile even though it scores 88th nationally — the state's overall wildfire exposure is high enough to make this a relatively quiet corner of it. Among the 31,521 US communities USFS scores, Rio Vista ranks 3,741 for wildfire risk (1 is highest) and 3,182 by building count (1 is largest). Within California alone, it ranks 677 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Rio Vista and the insurance market
Rio Vista's 88th-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 Rio Vista
Rio Vista's 88.5% Indirect-exposure share points at embers, not flame contact, as the main pathway — ember-resistant vents and non-combustible roofing rank ahead of defensible space here. Detail in the home-hardening guide.
Where Rio Vista's figures come from
Every one of the two percentiles behind Rio Vista's 3,741-place national rank traces to USFS's Wildfire Risk to Communities dataset — see the methodology guide. The exposure-zones guide covers what Rio Vista's dominant indirect exposure actually means, with real examples from across the dataset.