Dallas County, MO flood risk explained
Flood hazard in Dallas County sits at the 37.9th national percentile, below the national norm for flood hazard; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 3 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Who actually carries the flood insurance FEMA requires
Out of 51 homes FEMA counts inside Dallas County's mapped flood zone, 2 carry the flood policy federal law requires there — 3.9% compliance, short of full coverage. Looking beyond the mandated zone, 0.1% of all residential structures in Dallas County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Dallas County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Dallas County ranks 2017 — 1 being the highest hazard nationally — and 1939 by population among all 3144 counties covered here, where 1 is the largest. Dallas County, Missouri covers 540.951 square miles and counts roughly 17,877 residents.
Your street may differ from Dallas County's average
6 of Dallas County's 9,077 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Dallas County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.