NOAA launched a completely redesigned storm surge mapping tool on April 7, 2026, giving millions of coastal residents a clearer picture of their flood risk as the Atlantic hurricane season approaches.
What Is New in the Updated Tool
The updated Coastal Flood Exposure Mapper now uses high-resolution LiDAR elevation data and incorporates the effects of sea level rise, allowing users to see potential flooding at their specific address under various hurricane scenarios.
- Address-level flood risk assessments now available
- Scenarios range from Category 1 through Category 5 hurricanes
- Sea level rise projections through 2050 are incorporated
- Real-time tide data integrated for more accurate predictions
- Mobile-friendly interface for use during evacuations
Why Storm Surge Is the Biggest Killer
Storm surge is responsible for roughly half of all hurricane-related fatalities in the United States. Many residents in coastal areas underestimate their surge risk, particularly those who live miles from the beach but near bays, rivers, or low-lying terrain.
The updated tool addresses this knowledge gap by showing users exactly how many feet of water could inundate their property during different storm scenarios. It also overlays evacuation routes and shelter locations.
How to Use the Tool
Residents can access the free tool at surge.noaa.gov. Simply enter your address to see color-coded flood maps showing potential water depths. NOAA recommends that all coastal residents from Texas to Maine check their risk and develop an evacuation plan before June 1.
Insurance experts also suggest using the tool to evaluate whether your current flood insurance coverage is adequate, as many standard policies have coverage limits that may not reflect actual surge risk.
