Corona, CA
Corona wildfire risk explained
Out of every US place USFS scores, Corona lands at the 99th percentile for wildfire risk to structures — in USFS's highest wildfire-risk band nationally — a figure built from its 42,617 buildings, not the land around them. (Source: USFS's Wildfire Risk to Communities methodology.)
USFS's separate burn-probability score — fire likelihood alone, before counting what's built there — puts Corona at the 99th percentile, close to its 99th-percentile risk score.
Corona's building exposure, zone by zone
USFS puts 56.5% of Corona's 42,617 buildings in the Indirect exposure zone, versus 2.5% Direct and 41% Minimal — a place where the fire doesn't need to reach the structure directly for embers to. At 42,617 buildings, this is a substantial built environment, so the shares below describe a real population of structures, not a handful of edge cases.
How Corona compares
There's little gap between Corona's 99th national percentile and its 90th percentile inside California, which means the state comparison mostly confirms what the national score already shows. Among the 31,521 US communities USFS scores, Corona ranks 304 for wildfire risk (1 is highest) and 223 by building count (1 is largest). Within California alone, it ranks 157 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Shopping for coverage in Corona
Corona's 99th-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.
Lowering exposure, not just insuring around it
Corona's 56.5% 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 Corona's figures come from
The methodology guide shows exactly how USFS turned 42,617 counted buildings into the percentiles shown above for Corona. The exposure-zones guide covers what Corona's dominant indirect exposure actually means, with real examples from across the dataset.