Grenville, SD
Grenville wildfire risk explained
Grenville sits at the 49th percentile nationally for wildfire risk to structures — modestly above the national average for wildfire risk — per USFS's Wildfire Risk to Communities model, built from its 82 counted buildings, not vegetation cover alone. (Source: USFS's Wildfire Risk to Communities methodology.)
USFS's separate burn-probability score — fire likelihood alone, before counting what's built there — puts Grenville at the 47th percentile, close to its 49th-percentile risk score.
What "at risk" means for the buildings here
80.5% of Grenville's 82 buildings sit in USFS's Direct exposure zone, roughly 66 structures close enough to burnable vegetation for flame contact, not just embers — 19.5% fall in the Indirect, ember-only zone and 0% are Minimal.
How Grenville compares
Grenville's 49th national percentile looks worse in isolation than its 27th ranking inside South Dakota does — this place is on the milder end for its own state, by 22 points. Among the 31,521 US communities USFS scores, Grenville ranks 16,118 for wildfire risk (1 is highest) and 29,822 by building count (1 is largest). Within South Dakota alone, it ranks 320 of 439 places by risk. See the full county-by-county picture for South Dakota on its state page.
What this risk score means for insurance
Grenville's elevated rating (49th percentile nationally) sits outside the range where wildfire risk alone reshapes an insurance market — still, a homeowner here loses nothing by comparing rates.
Hardening a home in Grenville
Grenville's 80.5% Direct-exposure share means lot clearing around the structure typically outweighs any single material upgrade here. The home-hardening guide ranks the options for a place shaped like this.
More on how this number was built
Every one of the two percentiles behind Grenville's 16,118-place national rank traces to USFS's Wildfire Risk to Communities dataset — see the methodology guide. For more on what direct exposure implies beyond Grenville, see the exposure-zones guide.