FEMA relative scores

Riverine Flooding Risk Rankings

The highest relative riverine flooding scores among FEMA county-equivalent areas represented in the city directory.

One FEMA area can contain several covered cities. Each area appears once below, with links to its city pages. The score is a relative comparison measure, not the annual chance of a riverine flooding.

  1. #1
    Very High

    100.0

    relative score

  2. #2

    Galveston County, TX

    GalvestonLeague City
    Very High

    100.0

    relative score

  3. #3

    Brazoria County, TX

    Pearland
    Very High

    99.9

    relative score

  4. #4

    East Baton Rouge Parish, LA

    Baton Rouge
    Very High

    99.9

    relative score

  5. #5

    Shelby County, TN

    Memphis
    Very High

    99.9

    relative score

  6. #6

    Lafayette Parish, LA

    Lafayette
    Very High

    99.8

    relative score

  7. #7

    Miami-Dade County, FL

    HialeahMiamiMiami Gardens
    Very High

    99.8

    relative score

  8. #8

    St. Tammany Parish, LA

    MandevilleSlidell
    Very High

    99.7

    relative score

  9. #9

    Washoe County, NV

    RenoSparks
    Very High

    99.7

    relative score

  10. #10

    Davidson County, TN

    Nashville
    Very High

    99.7

    relative score

  11. #11

    Jefferson County, TX

    BeaumontPort Arthur
    Very High

    99.6

    relative score

  12. #12

    Kern County, CA

    Bakersfield
    Very High

    99.6

    relative score

  13. #13

    Jefferson County, AL

    BirminghamHoover
    Very High

    99.6

    relative score

  14. #14
    Relatively High

    99.5

    relative score

  15. #15
    Relatively High

    99.5

    relative score

  16. #16

    Fort Bend County, TX

    Sugar Land
    Relatively High

    99.5

    relative score

  17. #17

    Calcasieu Parish, LA

    Lake Charles
    Relatively High

    99.4

    relative score

  18. #18

    San Bernardino County, CA

    ChinoFontanaHesperiaOntarioRancho Cucamonga+3 more
    Relatively High

    99.4

    relative score

  19. #19

    Bexar County, TX

    San Antonio
    Relatively High

    99.3

    relative score

  20. #20

    Cameron County, TX

    BrownsvilleHarlingen
    Relatively High

    99.2

    relative score

  21. #21

    Cook County, IL

    ChicagoCicero
    Relatively High

    99.2

    relative score

  22. #22

    Montgomery County, TX

    ConroeThe Woodlands
    Relatively High

    99.1

    relative score

  23. #23
    Relatively High

    99.1

    relative score

  24. #24

    Linn County, IA

    Cedar Rapids
    Relatively High

    99.1

    relative score

  25. #25

    Washington County, UT

    St. George
    Relatively High

    99.0

    relative score

Other hazard rankings

AvalancheCoastal FloodingCold WaveDroughtEarthquakeHailHeat WaveHurricaneIce StormLandslideLightningStrong WindTornadoTsunamiVolcanic ActivityWildfireWinter Weather

Source: FEMA National Risk Index v1.19.0, released March 2023. Hazard figures cover FEMA county-equivalent areas.

Read the methodology →