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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15. Texas
> Pct. state designated Flood Hazard Area, EPA 2020: 13.0% (34,886 sq. mi.)
> County with highest coastline flood risk index score: Cameron (61.4/100 – Relatively High)
> County with highest riverine flood risk index score: Harris (100.0/100 – Very High)
> State population, 2021: 29,527,941

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14. Illinois
> Pct. state designated Flood Hazard Area, EPA 2020: 13.3% (7,696 sq. mi.)
> County with highest coastline flood risk index score: N/A
> County with highest riverine flood risk index score: Cook (40.9/100 – Very Low)
> State population, 2021: 12,671,469

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13. New Jersey
> Pct. state designated Flood Hazard Area, EPA 2020: 13.5% (1,181 sq. mi.)
> County with highest coastline flood risk index score: Ocean (100.0/100 – Very High)
> County with highest riverine flood risk index score: Ocean (28.6/100 – Relatively High)
> State population, 2021: 9,267,130

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12. Utah
> Pct. state designated Flood Hazard Area, EPA 2020: 13.7% (11,637 sq. mi.)
> County with highest coastline flood risk index score: Salt Lake (3.2/100 – Very Low)
> County with highest riverine flood risk index score: Washington (39.3/100 – Relatively Moderate)
> State population, 2021: 3,337,975

Delaware National Guard by The National Guard

Delaware National Guard (CC BY 2.0) by The National Guard

11. Delaware
> Pct. state designated Flood Hazard Area, EPA 2020: 13.8% (343 sq. mi.)
> County with highest coastline flood risk index score: Sussex (38.4/100 – Relatively High)
> County with highest riverine flood risk index score: New Castle (12.4/100 – Relatively Moderate)
> State population, 2021: 1,003,384

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