Spring Valley, AZ
Spring Valley wildfire risk explained
Out of every US place USFS scores, Spring Valley lands at the 90th percentile for wildfire risk to structures — in USFS's highest wildfire-risk band nationally — a figure built from its 701 buildings, not the land around them. (Source: USFS's Wildfire Risk to Communities methodology.)
Separately from the risk score above, Spring Valley's burn probability — fire likelihood with no building count factored in — sits at the 90th percentile nationally.
Spring Valley's building exposure, zone by zone
59.2% of Spring Valley's 701 buildings fall in USFS's Indirect exposure zone — ember cast rather than direct flame — against 40.8% Direct and 0% Minimal. Vent screens and roofing material matter more here than lot clearing alone.
How Spring Valley compares
Spring Valley's 90th national percentile looks worse in isolation than its 64th ranking inside Arizona does — this place is on the milder end for its own state, by 26 points. Among the 31,521 US communities USFS scores, Spring Valley ranks 3,044 for wildfire risk (1 is highest) and 14,642 by building count (1 is largest). Within Arizona alone, it ranks 160 of 441 places by risk. See the full county-by-county picture for Arizona on its state page.
Spring Valley and the insurance market
At the 90th percentile nationally, Spring Valley 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.
Hardening a home in Spring Valley
Spring Valley's 59.2% 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 Spring Valley's figures come from
The methodology guide shows exactly how USFS turned 701 counted buildings into the percentiles shown above for Spring Valley. The exposure-zones guide covers what Spring Valley's dominant indirect exposure actually means, with real examples from across the dataset.