Maps
Inland Floods, Annualized Frequency [P]
Inland Floods, Risk Score [P]
Coastal Floods, Annualized Frequency [P]
Coastal Floods, Risk Score [P]
Data Sources
Further Information
These maps display the annualized frequency and risk scores for inland and coastal floods in 2025.
Flooding is the most common disaster in the United States;† it can be caused by extreme rain or snowfall, hurricanes, storm surges, and sea level rise, and can occur with little warning.† In addition to direct fatalities from drowning and debris, floods can contaminate water supplies and disrupt critical infrastructure like road, bridges, and power plants.† Property losses can occur even with very little ingress; a single inch of water in the average home can cause $25,000 of damage.†
Coastlines can experience flooding when sea levels rise suddenly, which often occurs as a result of tropical storms.† Areas alongside rivers experience flooding when extreme rainfall or snowmelt accumulates and overflows their banks.† Urban areas are more susceptible to flash floods, as impermeable surfaces like asphalt and concrete are unable to absorb stormwater and runoff.†
Climate change is projected to increase the frequency and severity of flooding across America; sea level rise, extreme rainfall, urban development, and drought are the largest contributing factors.† As flood risk can vary greatly within communities, we recommend using address-level tools (such as FEMA flood maps) to determine your exposure.†
