Grimes County, TX flood risk explained
Flood hazard in Grimes County sits at the 35.3th 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 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 Grimes County
16.3% of the homes FEMA requires to carry flood insurance in Grimes County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 65 policies against 398 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 2% of all residential structures in Grimes County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Grimes County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Grimes County ranks 2095 — 1 being the highest hazard nationally — and 1354 by population among all 3144 counties covered here, where 1 is the largest. Grimes County, Texas is home to about 33,448 people across 787.47 square miles of land.
Checking a specific address in Grimes County
197 of Grimes County's 9,926 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Grimes 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.