Property Atlas

County hazard profile

Williamson, TN

Tennessee · pop. 247,523 · FIPS 47187

Relatively Moderate
FEMA risk rating · RATING
Cold Wave
dominant hazard
$98M
modeled expected annual loss/yr

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

lower than most counties (30th percentile)

national median $15M/yr Williamson $98M

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 85.15/100
national median ~50 higher than 85% of counties
Social vulnerabilityVery Low 10.62/100
national median ~50 among the lowest nationally
Community resilienceVery High 95.23/100
national median ~50 among the highest nationally

Recorded · NFIP flood claims RECORDED

Realized flood losses in Williamson

The National Flood Insurance Program has paid 1,099 flood-insurance claims totaling $31.0M in Williamson since 1978. The costliest year was 2010 ($18.2M paid).

Flood-insurance dollars paid by year of loss

1978: $1,022 paid 1979: $209,366 paid 1980: $176,376 paid 1981: $692 paid 1982: $3,711 paid 1983: $4,450 paid 1984: $76,135 paid 1986: $11,152 paid 1987: $0 paid 1988: $4,713 paid 1989: $6,524 paid 1990: $421,547 paid 1991: $8,488 paid 1992: $0 paid 1993: $114,594 paid 1994: $220,468 paid 1995: $32,427 paid 1996: $0 paid 1997: $32,134 paid 1998: $231,068 paid 1999: $194,414 paid 2000: $68,724 paid 2001: $8,811 paid 2003: $617,672 paid 2004: $78,445 paid 2008: $4,903 paid 2009: $27,622 paid 2010: $18,199,757 paid 2011: $202,642 paid 2013: $200,169 paid 2015: $44,603 paid 2017: $454,554 paid 2018: $0 paid 2019: $80,654 paid 2020: $686,929 paid 2021: $8,311,947 paid 2022: $43,533 paid 2023: $0 paid 2024: $152,740 paid 2025: $84,541 paid 2010 · $18.2M 1978 2025
$31.0M
total paid
$28,223
average claim
$502K
largest single claim
75%
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, TN 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.