McMullen County, TX: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, McMullen County scores at the 2.2th percentile for flood hazard, rated "Very Low" — among the lowest flood hazard in the country. 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 once every 1 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
McMullen County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for McMullen County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 1.9% of all residential structures in McMullen County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
McMullen County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, McMullen County ranks 3081 — 1 being the highest hazard nationally — and 3135 by population among all 3144 counties covered here, where 1 is the largest. McMullen County, Texas covers 1,139.799 square miles and counts roughly 565 residents.
Checking a specific address in McMullen County
FEMA counts 520 residential structures in McMullen County overall, 10 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where McMullen County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. McMullen County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.