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
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
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
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
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
