Onslow, IA
How exposed is Onslow to wildfire?
Out of every US place USFS scores, Onslow lands at the 29th percentile for wildfire risk to structures — close to the middle of USFS's national wildfire-risk range — a figure built from its 184 buildings, not the land around them. (Source: USFS's Wildfire Risk to Communities methodology.)
USFS's separate burn-probability score — fire likelihood alone, before counting what's built there — puts Onslow at the 29th percentile, close to its 29th-percentile risk score.
What "at risk" means for the buildings here
88% of Onslow's 184 buildings sit in USFS's Minimal exposure zone, with only 12% rated Direct — risk here comes from regional burn probability more than proximity to burnable vegetation at the structure itself.
How Onslow compares
There's little gap between Onslow's 29th national percentile and its 43rd percentile inside Iowa, which means the state comparison mostly confirms what the national score already shows. Among the 31,521 US communities USFS scores, Onslow ranks 22,433 for wildfire risk (1 is highest) and 25,459 by building count (1 is largest). Within Iowa alone, it ranks 578 of 1,017 places by risk. See the full county-by-county picture for Iowa on its state page.
Onslow and the insurance market
Onslow's moderate rating (29th 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 88% of buildings rated Minimal exposure, Onslow gets less benefit from structure hardening than a Direct- or Indirect-dominant place would — the home-hardening guide explains why the zone matters.
Where Onslow's figures come from
Onslow's 29th-percentile score and its burn-probability figure both come from the same USFS workbook, documented in the methodology guide. The exposure-zones guide covers what Onslow's dominant minimal exposure actually means, with real examples from across the dataset.