Williamson, AZ
Williamson wildfire risk explained
Williamson sits at the 92nd percentile nationally for wildfire risk to structures — in USFS's highest wildfire-risk band nationally — per USFS's Wildfire Risk to Communities model, built from its 4,860 counted buildings, not vegetation cover alone. (Source: USFS's Wildfire Risk to Communities methodology.)
Fire likelihood alone (USFS's burn-probability figure) ranks Williamson at the 90th national percentile — 3 points below its risk-to-structures score, a gap driven by how much is actually built there.
What "at risk" means for the buildings here
Of Williamson's 4,860 counted buildings, 94.2% carry Direct exposure and only 0% carry Minimal — a lopsided split that puts defensible-space clearing ahead of vents or roofing as the intervention worth doing first.
Williamson against the rest of the country
Williamson's 92nd national percentile looks worse in isolation than its 69th ranking inside Arizona does — this place is on the milder end for its own state, by 24 points. Among the 31,521 US communities USFS scores, Williamson ranks 2,384 for wildfire risk (1 is highest) and 3,519 by building count (1 is largest). Within Arizona alone, it ranks 138 of 441 places by risk. See the full county-by-county picture for Arizona on its state page.
What this risk score means for insurance
At the 92nd percentile nationally, Williamson carries the very high rating that has pushed some carriers to limit new business in similarly-scored places elsewhere in the country. Worth comparing quotes rather than assuming last year's renewal terms still apply.
What would actually reduce this score
Because Direct exposure dominates in Williamson (94.2%), the highest-leverage fix is defensible space, not roofing or vents alone — covered in the home-hardening guide.
More on how this number was built
Williamson's 92nd-percentile score and its burn-probability figure both come from the same USFS workbook, documented in the methodology guide. For more on what direct exposure implies beyond Williamson, see the exposure-zones guide.