17 Million Americans Coastal Flood Risk 2026: The Insurance Gap Nobody Is Talking About

# 17 Million Americans Coastal Flood Risk 2026: The Insurance Gap Nobody Is Talking About

> **Quick answer:** A landmark University of Alabama study published April 24, 2026 in *Science Advances* found 17.5 million Americans live in "very high" coastal flood risk zones — with New York City (4.75 million), New Orleans (99% of the city), Jacksonville, and Houston most exposed. The timing is alarming: the National Flood Insurance Program is set to expire September 30, 2026, right in the middle of hurricane season, and 96% of U.S. homeowners carry no flood insurance at all.

A new AI-powered study has just remapped coastal flood risk for the entire Atlantic and Gulf coast — and the numbers are far worse than most Americans realize. The 17 million Americans coastal flood risk 2026 study, published in *Science Advances*, is the most comprehensive flood risk analysis ever conducted for U.S. coastal communities, and its findings land at the worst possible time.

*This article is for informational purposes only and does not constitute financial advice. Consult a qualified financial advisor or licensed insurance professional for personal coverage decisions.*

## What the University of Alabama AI Study Actually Found

Researchers at the University of Alabama spent years building a risk model that goes far beyond the crude FEMA flood zone maps most homeowners rely on. Instead of using a single factor, the team fed 16 different variables into three separate AI tools: geographic hazards, exposed population density, infrastructure vulnerability, human socioeconomic fragility, and historical FEMA damage data from past flood events.