Glossary

Storm surge

The abnormal rise of seawater that a hurricane or strong storm pushes onshore above the normal tide, treated as flood and excluded from homeowners policies.

Also called: hurricane storm surge, tidal surge

Storm surge is the rise in seawater that a hurricane or other strong storm drives onto land, above the level of the normal tide. The National Hurricane Center describes it as the leading cause of fatalities from hurricanes, and the water can travel well inland up rivers and canals.

For insurance purposes, storm surge is flood. The ISO homeowners form includes it within the flood exclusion, and nearly all homeowners policies treat it the same way, so water damage from rising ocean or bay water goes to a flood policy from the NFIP or a private insurer. The wind that came with the storm is a separate cause, paid under the windstorm provisions and subject to any hurricane deductible.

That split produces the usual hurricane dispute. Say a hurricane strips shingles off the roof and surge then floods the ground floor (hypothetical). The insurers argue over which damage came from wind, which from water and in what order, a question that turns on policy wording and state law (concurrent causation). Time-stamped photos taken before and after the storm help.

Flood policies normally carry a waiting period, 30 days in most NFIP cases, so buying when a storm is forecast is too late. The guide hurricane coverage: wind, flood and storm surge covers how the policies fit together.

Last reviewed October 10, 2026

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Related terms

Flood exclusion The standard homeowners provision that excludes flood, surface water, tides and overflowing water bodies, leaving flood damage to a separate flood policy. Windstorm The peril of damage from high winds, including hurricanes, tornadoes and thunderstorm gusts, which most policies cover, sometimes with a separate deductible. Hurricane deductible A separate amount you pay first, usually a percentage of the dwelling limit, that applies to wind damage from a hurricane in place of your regular flat amount. National Flood Insurance Program (NFIP) The federal program, run by FEMA since 1968, that makes flood insurance available to owners and renters in communities that adopt floodplain management rules. Surface water Rain or melted snow that spreads across the ground without a defined channel, treated as flood damage and excluded from homeowners policies.

Related guides

Does homeowners insurance cover flooding? No. A standard homeowners policy excludes flood, surface water and storm surge. Flood coverage takes a separate NFIP or private flood policy. What Hurricanes Helene and Milton taught homeowners Two 2024 hurricanes two weeks apart exposed gaps in flood cover, deductible timing and inland wind claims. Loss, NFIP and Florida OIR figures, plus a checklist. Hurricane coverage: wind, flood and storm surge A standard homeowners policy pays for hurricane wind damage but not for flood or storm surge. What each policy covers, where the gaps are and what to check. Wind vs water: the hurricane claim dispute Your homeowners policy pays for wind and your flood policy for water. When one storm does both, how the damage is split decides who pays, and how to contest it.

Related disasters

Hurricane Helene (2024) Helene hit Florida's Big Bend as a Category 4 in Sept. 2024, then flooded the Appalachians. About $17.5 billion insured (Aon); most inland flood was uninsured. Hurricane Isaias (2026) Isaias struck near Destin, Florida, on Oct. 9, 2026 at 105 mph. Hurricane deductibles apply, FEMA aid is limited, and Florida's 1-year claim clock runs. Hurricane Milton (2024) Milton hit Siesta Key, Florida, as a Category 3 on Oct. 9, 2024: 385,146 Florida claims, $20 billion insured (Aon). Notice windows closed; suits run 5 years.