20 States With the Highest Risk of Flooding

Special Report

February 4, 2023 1:03 am

Last Updated: February 4, 2023 1:04 pm

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5. South Carolina
> Pct. state designated Flood Hazard Area, EPA 2020: 19.7% (6,311 sq. mi.)
> County with highest coastline flood risk index score: Beaufort (27.4/100 – Relatively Moderate)
> County with highest riverine flood risk index score: Beaufort (22.9/100 – Relatively High)
> State population, 2021: 5,190,705

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4. Arkansas
> Pct. state designated Flood Hazard Area, EPA 2020: 19.9% (10,560 sq. mi.)
> County with highest coastline flood risk index score: N/A
> County with highest riverine flood risk index score: Jefferson (23.1/100 – Relatively Moderate)
> State population, 2021: 3,025,891

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3. Mississippi
> Pct. state designated Flood Hazard Area, EPA 2020: 21.1% (10,235 sq. mi.)
> County with highest coastline flood risk index score: Jackson (14.7/100 – Relatively Low)
> County with highest riverine flood risk index score: Hinds (34.6/100 – Relatively Moderate)
> State population, 2021: 2,949,965

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2. Florida
> Pct. state designated Flood Hazard Area, EPA 2020: 31.7% (20,850 sq. mi.)
> County with highest coastline flood risk index score: Miami-Dade (94.0/100 – Very High)
> County with highest riverine flood risk index score: Miami-Dade (77.2/100 – Very High)
> State population, 2021: 21,781,128

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1. Louisiana
> Pct. state designated Flood Hazard Area, EPA 2020: 41.7% (21,844 sq. mi.)
> County with highest coastline flood risk index score: Jefferson (34.2/100 – Relatively Moderate)
> County with highest riverine flood risk index score: East Baton Rouge (39.8/100 – Relatively High)
> State population, 2021: 4,624,047

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