Interior, SD
Interior, SD's wildfire risk, in USFS's own numbers
USFS scores Interior at the 80th national percentile for wildfire risk to structures (in USFS's highest wildfire-risk band nationally), a figure built from 128 real buildings rather than raw vegetation cover. (Source: USFS's Wildfire Risk to Communities methodology.)
USFS's separate burn-probability score — fire likelihood alone, before counting what's built there — puts Interior at the 79th percentile, close to its 80th-percentile risk score.
What "at risk" means for the buildings here
128 buildings are counted in Interior, and 51.6% of them are Indirect exposure — ember-driven risk rather than the 48.4% in Direct exposure or the 0% rated Minimal.
Where Interior ranks
Interior's risk sits at a similar level relative to South Dakota (80th percentile statewide) as it does nationally (80th) — this place isn't unusual for its own state either way. Among the 31,521 US communities USFS scores, Interior ranks 6,189 for wildfire risk (1 is highest) and 27,824 by building count (1 is largest). Within South Dakota alone, it ranks 88 of 439 places by risk. See the full county-by-county picture for South Dakota on its state page.
Interior and the insurance market
Interior's 80th-percentile, very high rating is the kind of score behind a broader national pattern: insurers pulling back from the highest wildfire-risk markets, non-renewing or declining new policies outright, most visibly in California. Shopping around, not assuming automatic renewal, tends to matter here.
What would actually reduce this score
With ember exposure the dominant pattern in Interior (51.6% Indirect), vent screens and roofing material tend to matter more than lot clearing alone. The home-hardening guide covers both.
More on how this number was built
Interior's 80th-percentile score and its burn-probability figure both come from the same USFS workbook, documented in the methodology guide. For more on what indirect exposure implies beyond Interior, see the exposure-zones guide.