San Jacinto County, TX: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, San Jacinto County scores at the 61th percentile for flood hazard, rated "Relatively Low" — below the national norm for flood hazard. The hazard here is driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.3 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in San Jacinto County
15.5% of the homes FEMA requires to carry flood insurance in San Jacinto County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 254 policies against 1,642 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 2.3% of all residential structures in San Jacinto County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
San Jacinto County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, San Jacinto County ranks 1284 — 1 being the highest hazard nationally — and 1459 by population among all 3144 counties covered here, where 1 is the largest. About 29,326 people live in San Jacinto County, Texas, spread over 569.244 square miles.
Checking a specific address in San Jacinto County
379 of San Jacinto County's 16,643 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where San Jacinto 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.