US Flood Insurance Gap Remains Wide and Worsening, Moody's Warns

The United States faces a persistent and worsening flood insurance protection gap, according to a warning from credit rating agency Moody's. The gap — the difference between economic losses from flooding and the portion that is actually insured — remains wide and shows no signs of narrowing, leaving millions of American homeowners and businesses dangerously exposed to catastrophic, uninsured flood losses.

Flooding is the most common and costly natural disaster in the United States, yet flood coverage is typically excluded from standard homeowners insurance policies. Most residential flood coverage in the US is provided through the National Flood Insurance Program (NFIP), administered by the Federal Emergency Management Agency (FEMA), which writes more than 90% of all residential flood coverage nationwide because private insurers have historically been reluctant to enter the market. Despite this federal backstop, take-up rates for flood insurance remain low, even in high-risk areas — meaning that when floods strike, a large share of the resulting damage falls on uninsured property owners, who must rely on savings, loans, credit cards, or disaster relief to recover.

The Moody's warning is particularly timely. Flooding has continued to be a serious problem across the US Southeast, with storms bringing new rounds of heavy rainfall across the region. Climate change is intensifying both the frequency and severity of flood events, expanding flood risk into areas that have not traditionally been considered high-hazard. This expansion of risk into unmapped or under-mapped areas exacerbates the protection gap, as property owners in newly at-risk locations often lack coverage and may be unaware of their exposure.

The flood insurance gap carries significant implications for household financial security and broader economic resilience. Uninsured flood losses can be financially devastating for families, often forcing them to take on debt or, in severe cases, abandon damaged properties. For the broader economy and financial system, the gap represents a source of systemic vulnerability — uninsured losses can depress property values, strain local government budgets dependent on property taxes, and create risks for mortgage lenders and investors in mortgage-backed securities. Closing the flood protection gap remains one of the most pressing challenges for insurers, reinsurers, policymakers, and the NFIP as climate-driven flood risk continues to mount.