Top 10 Most Flood-Prone Cities in America

Measuring Flood Risk in Cities

Flood risk in urban areas depends on geography, climate, infrastructure, development patterns, and proximity to water. We evaluated cities based on the percentage of properties in FEMA flood zones, historical flood damage, frequency of flood events, and projected future risk from sea level rise and increased precipitation.

The Top 10

1. Houston, TX — Flat terrain, clay soils, rapid development, and Gulf hurricanes create a perfect storm. Harvey's $125 billion in damage underscored the city's vulnerability.

2. Miami, FL — Low elevation, porous limestone bedrock, and rising seas make Miami one of the most climate-vulnerable cities on Earth.

3. New Orleans, LA — Much of the city sits below sea level, protected by levees that catastrophically failed during Hurricane Katrina.

4. Tampa/St. Petersburg, FL — A shallow bay amplifies storm surge, and a major hurricane strike could cause unprecedented damage.

5. Norfolk/Virginia Beach, VA — Subsiding land combined with rising seas creates increasing tidal and storm flooding.

6. Charleston, SC — Low-lying coastal city experiencing frequent tidal flooding and hurricane exposure.

7. Sacramento, CA — Situated at the confluence of two major rivers, protected by an aging levee system.

8. Baton Rouge, LA — The 2016 floods demonstrated the city's extreme vulnerability to heavy rainfall events.

9. Jacksonville, FL — Extensive river frontage and coastal exposure create compound flood risks.

10. Atlantic City, NJ — Barrier island location with minimal elevation above sea level.

What These Cities Have in Common

All ten cities share low elevation, proximity to major water bodies, aging infrastructure, and exposure to either hurricanes or heavy rainfall events. Population growth and development in flood-prone areas have compounded the risk over decades.

Explore Your City

Use our ZIP code lookup to see detailed flood risk data for any city in the United States. Understanding local risk is the first step toward protecting your property and family.