Vienna, SD
Vienna, SD's wildfire risk, in USFS's own numbers
Vienna's 75 buildings earn a 43rd-percentile wildfire-risk score nationally under USFS's model — modestly above the national average for wildfire risk. (Source: USFS's Wildfire Risk to Communities methodology.)
Fire likelihood alone (USFS's burn-probability figure) ranks Vienna at the 39th national percentile — 4 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
Direct exposure dominates in Vienna: 69.3% of its 75 buildings, versus 0% Indirect and 30.7% Minimal. Clearing space around a structure changes the outcome here more than any single building-material swap.
How Vienna compares
Vienna's 43rd national percentile looks worse in isolation than its 18th ranking inside South Dakota does — this place is on the milder end for its own state, by 25 points. Among the 31,521 US communities USFS scores, Vienna ranks 18,042 for wildfire risk (1 is highest) and 30,108 by building count (1 is largest). Within South Dakota alone, it ranks 361 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
Vienna's elevated rating (43rd percentile nationally) sits outside the range where wildfire risk alone reshapes an insurance market — still, a homeowner here loses nothing by comparing rates.
What would actually reduce this score
With 69.3% of Vienna 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 Vienna's figures come from
Every one of the two percentiles behind Vienna's 18,042-place national rank traces to USFS's Wildfire Risk to Communities dataset — see the methodology guide. The exposure-zones guide covers what Vienna's dominant direct exposure actually means, with real examples from across the dataset.