Property Atlas

County hazard profile

Williamson, TX

Texas · pop. 608,015 · FIPS 48491

Relatively Moderate
FEMA risk rating · RATING
Hail
dominant hazard
$137M
modeled expected annual loss/yr

Expected annual loss · all 3,232 U.S. counties

near the national middle (42nd percentile)

national median $15M/yr Williamson $137M

A real dollar distribution: most counties sit far below a handful of high-exposure ones. A FEMA model of annual loss, not a record of disasters.

FEMA national percentile scores

FEMA/CDC score each county 0–100 against all others — the score is the national rank (RATING). Higher risk and vulnerability are worse; higher resilience is better.

FEMA risk indexRelatively Moderate 90.11/100
national median ~50 among the highest nationally
Social vulnerabilityVery Low 10.62/100
national median ~50 among the lowest nationally
Community resilienceVery High 87.91/100
national median ~50 higher than 88% of counties

Recorded · NFIP flood claims RECORDED

Realized flood losses in Williamson

The National Flood Insurance Program has paid 740 flood-insurance claims totaling $21.8M in Williamson since 1979. The costliest year was 2010 ($10.7M paid).

Flood-insurance dollars paid by year of loss

1979: $4,306 paid 1980: $54,655 paid 1981: $354,549 paid 1982: $456,315 paid 1983: $8,973 paid 1984: $677,901 paid 1985: $16,220 paid 1986: $2,348 paid 1987: $46,629 paid 1989: $20,052 paid 1990: $8,431 paid 1991: $168,633 paid 1992: $69,632 paid 1993: $9,551 paid 1994: $83,858 paid 1995: $26,814 paid 1996: $84,204 paid 1997: $247,959 paid 1998: $13,599 paid 1999: $0 paid 2000: $32,381 paid 2001: $271,100 paid 2002: $8,129 paid 2003: $4,713 paid 2004: $146,847 paid 2005: $0 paid 2007: $1,210,225 paid 2008: $6,962 paid 2009: $14,714 paid 2010: $10,714,501 paid 2011: $0 paid 2012: $43,186 paid 2013: $486,345 paid 2014: $35,224 paid 2015: $2,895,858 paid 2016: $165,015 paid 2017: $14,077 paid 2018: $262,270 paid 2019: $1,883 paid 2020: $55,361 paid 2021: $0 paid 2022: $39,093 paid 2023: $107,979 paid 2025: $2,939,640 paid 2026: $11,000 paid 2010 · $10.7M 1979 2026
$21.8M
total paid
$29,488
average claim
$350K
largest single claim
49%
in high-risk flood zones (A/V)

RECORDED — these are actual paid NFIP claims (a redacted census from OpenFEMA), not a model. They are the realized counterpart to the FEMA risk score above: one is what happened and got paid, the other is what a model predicts.

Scope: these are flood-insurance claims, so they undercount flooding where owners were uninsured — read this as "what NFIP paid here," not "every flood." County-level totals, not a per-property or per-address verdict. Verify a specific address and buy coverage at FloodSmart.gov; the underlying data is OpenFEMA NFIP Redacted Claims.

What these figures mean

  • RATING — the FEMA risk score, expected loss, social vulnerability, and resilience are FEMA/CDC models, not records of disasters that happened. The 0–100 scores are already national percentiles.
  • MEASURED — population is a recorded census figure.
  • COMPUTED — the county's rank within the dollar-loss distribution is our placement over the 3,232 counties.
  • CONTEXT — the note below is framing, not a measurement.

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What this is — and is not

This is FEMA/CDC modeled hazard exposure for Williamson, TX and where it ranks among U.S. counties. It is not a verdict on whether Williamson is a good or bad place to live — hazard exposure is not place quality, and a county can't opt out of its geography. It is not a per-property or per-address risk assessment, not a prediction of any specific disaster, and not insurance advice. For site-specific risk use a per-property assessment; for the underlying model see FEMA National Risk Index.