Port Costa, CA
Port Costa, CA's wildfire risk, in USFS's own numbers
Port Costa's 99 buildings earn a 93rd-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 Port Costa at the 94th percentile, close to its 93rd-percentile risk score.
What "at risk" means for the buildings here
USFS classifies 85.9% of Port Costa's buildings as Direct exposure, higher than its 14.1% Indirect share and far above its 0% Minimal share — a profile where 85 structures sit close enough to vegetation that lot clearing matters most.
Where Port Costa ranks
Port Costa's 93rd national percentile looks worse in isolation than its 69th ranking inside California does — this place is on the milder end for its own state, by 24 points. Among the 31,521 US communities USFS scores, Port Costa ranks 2,102 for wildfire risk (1 is highest) and 29,065 by building count (1 is largest). Within California alone, it ranks 486 of 1,570 places by risk. See the full county-by-county picture for California on its state page.
Port Costa and the insurance market
Port Costa 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 93rd-percentile score like Port Costa's can end up mattering for. More on the disclosure law.
Hardening a home in Port Costa
With 85.9% of Port Costa in Direct exposure, defensible-space clearing and ember-resistant construction (vents, Class-A roofing) address the exposure this page's own numbers describe, not a generic checklist. See the home-hardening guide.
Where Port Costa's figures come from
Every one of the two percentiles behind Port Costa's 2,102-place national rank traces to USFS's Wildfire Risk to Communities dataset — see the methodology guide. The exposure-zones guide covers what Port Costa's dominant direct exposure actually means, with real examples from across the dataset.