Norco, CA
How exposed is Norco to wildfire?
Out of every US place USFS scores, Norco lands at the 82nd percentile for wildfire risk to structures — in USFS's highest wildfire-risk band nationally — a figure built from its 13,776 buildings, not the land around them. (Source: USFS's Wildfire Risk to Communities methodology.)
Fire likelihood alone (USFS's burn-probability figure) ranks Norco at the 83rd national percentile — 2 points above its risk-to-structures score, a gap driven by how much is actually built there.
What "at risk" means for the buildings here
Indirect exposure is dominant in Norco (37.8% of 13,776 buildings): far enough from burnable vegetation to avoid flame contact, close enough for wind-blown embers. Only 26.2% sit in the Direct zone. At 13,776 buildings, this is a substantial built environment, so the shares below describe a real population of structures, not a handful of edge cases.
Norco against the rest of the country
Inside California, Norco sits at just the 43rd percentile even though it scores 82nd 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, Norco ranks 5,825 for wildfire risk (1 is highest) and 1,099 by building count (1 is largest). Within California alone, it ranks 901 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
What this risk score means for insurance
Norco sits in California, one of two states that legally require a wildfire-risk disclosure at sale. California's FAIR Plan, the state's insurer of last resort, ended 2025 with 668,609 residential policies after adding 21,859 in Q4 alone — the kind of market shift a 82nd-percentile score like Norco's can end up mattering for. More on the disclosure law.
What would actually reduce this score
Because 37.8% of Norco's buildings sit in the Indirect zone, sealing the ember pathway (vents, roofing, gutters) is the intervention this page's data actually supports — see the home-hardening guide.
Where Norco's figures come from
The methodology guide shows exactly how USFS turned 13,776 counted buildings into the percentiles shown above for Norco. The exposure-zones guide covers what Norco's dominant indirect exposure actually means, with real examples from across the dataset.