Moody's Just Put a Price on America's Flood Insurance Gap: $375 Billion Uninsured, and That Is the Mild Scenario
The Numbers Moody's Put on the Table
The report, U.S. Flood Risk: A Country-Level Analysis, models residential flood losses in every county in the contiguous US and compares them with what is actually insured. In the base scenario, a flood with a 1 percent annual chance at each location, potential uninsured losses aggregate to $375 billion nationwide, with 65 percent of the total loss uninsured. Moody's stresses this is not one giant simultaneous flood but the sum of county-level exposure.
Push the model to a 1-in-500-year severity and uninsured exposure passes $1 trillion, with the protection gap above 70 percent. Under an intermediate-emissions climate scenario, the 1-in-100-year figure grows about 25 percent by 2050, to roughly $472 billion.
The concentration is stark. Fewer than 2 percent of counties carry 65 percent of the nationwide uninsured exposure, and the counties with more than $5 billion each at stake cluster in Florida, Louisiana, South Carolina, and Texas. Yet the risk is not just coastal: Moody's finds 90 percent of counties face some level of flood exposure, generally with high protection gaps.
The Gap Is Not Closing
Coverage is moving the wrong way. As Insurance Journal reports from a recent Moody's webinar on the findings, about 470,000 National Flood Insurance Program policies were lost between 2018 and early this year, and 5.6 million policies have left the program since 2009. Private flood insurers have roughly doubled their policy count since 2020, but they still represent only around 10 percent of policies in force, so the national protection gap has not materially narrowed.
"When flood losses happen and they are not absorbed by the shock absorber of insurance, they don't disappear," Firas Saleh, a Moody's director, told the webinar. The costs land on uninsured households, federal aid, and increasingly on state and local budgets. After Hurricane Helene's 2024 flooding, Buncombe County, North Carolina had its credit outlook cut to negative before it was restored this April; Moody's models put the county's flood protection gap at roughly 88 percent.
Why the FEMA Map on Your Street Can Mislead You
Mortgage lenders only require flood insurance inside FEMA's mapped 1-in-100-year zones. The problem, per Moody's, is that those maps are built primarily around river flooding and leave out much of the risk from extreme rainfall, stronger storm surge, and sea-level rise. For the Houston area, Insurance Journal notes, Moody's modeling shows a 1-in-100-year flood reaching a vastly larger area than the FEMA maps do.
Two more stress points from the report coverage: America has about 100,000 miles of levees, mostly along rivers and lakes, and their average age is 60 years. Helene's rainfall in the Asheville area exceeded a 1-in-1,000-year return period, the kind of event backward-looking maps are not built to anticipate.
What This Means for Your Policy
- Check what you actually have. Flood damage is excluded from standard homeowners policies; it requires a separate NFIP or private flood policy. If you have never bought one, you are in the gap by default.
- Do not treat "outside the FEMA zone" as all clear. The Moody's analysis exists precisely because meaningful losses keep happening beyond the mapped lines.
- Know the NFIP ceiling. NFIP building coverage caps at $250,000. Owners of pricier homes sometimes layer a private policy on top to get closer to replacement value.
- Price it before you dismiss it. Flood is one line item in a bill that has many moving parts; see what actually drives your premium, then run your profile through the cost estimator to see where you stand before requoting.
Educational content, not insurance or financial advice. All figures are taken from the Moody's report and Insurance Journal coverage cited above, as of July 14, 2026, and reflect modeled scenarios rather than forecasts; confirm program terms and your own coverage with your carrier or agent. We are not affiliated with Moody's, Insurance Journal, FEMA, or the NFIP.
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