Storm Surge Sits Outside Most B.C. Home Policies As A Kelvin Wave Lifts Sea Levels 6 To 12 Inches

Abstractions do not persuade anyone to open a filing cabinet. A documented claim might.

Westland Insurance, a national brokerage headquartered in B.C., described a coastal loss in which a winter windstorm tore shingles off a roof while exceptionally high tides pushed seawater onto the property and into the crawl space. The wind damage was covered. The wind-driven rain that entered through the damaged roof was covered. Additional living expenses during remediation were covered. The seawater in the crawl space was not, because coastal flooding was excluded under that policy — and the homeowner had bought overland water coverage, believing it meant every kind of flooding.

That is the whole article in one claim file. Same storm. Same house. Same afternoon. Two different answers, decided entirely by which document the water was described in.

The broader Canadian flood insurance story is genuinely a good-news story, and it is worth getting the numbers right. The Insurance Bureau of Canada's July 2026 report found that roughly 94 per cent of residential properties are now eligible for overland flood insurance, that household take-up climbed from 26 per cent in 2017 to 71 per cent in 2023, and that 88 per cent of overland flood policies now cost $300 or less a year.

The same report corrects a figure still circulating in coverage of this story. The number of Canadian homes unable to access overland flood insurance has fallen by nearly 45 per cent over seven years — from approximately 1.5 million to roughly 850,000. The 1.5 million figure is the older number, and repeating it today understates how much the market has moved.

But eligibility for overland flood insurance is not eligibility for coastal flood insurance. Those two facts sit side by side without touching. A homeowner in a Fraser Valley subdivision and a homeowner on a Vancouver Island waterfront can both be inside that 94 per cent and still be in completely different positions when seawater arrives.

Optional overland flood coverage stayed optional through Edmonton's $230-million storm season, a pattern that repeats every time a major Canadian water event lands.

Co-operators says its Comprehensive Water coverage is the only Canadian product extending to storm surge and coastal flooding at every risk level, a claim the company repeated in its most recent annual report alongside a figure of roughly 739,000 covered households; trade coverage put the total near 745,000 households by mid-2026. That is the company's own characterization of its market position, and it is worth treating as such rather than as an independent finding.

What the product actually says is more useful than what the marketing says. The coverage defines storm surge as a rise in lake or ocean level above the normal, predicted level during a storm, and extends to waves and spray resulting from a storm, surface water, overflow from natural or man-made bodies of water, sewer and septic backup, and a rising water table.

Two structural details deserve attention before anyone assumes this is a simple upgrade. The deductible is a percentage of the claim amount — from 2 per cent to 35 per cent, subject to a minimum — rather than a flat dollar figure, which behaves very differently on a large loss than the deductible most homeowners are used to. And the coverage includes a loss prevention reimbursement of up to $5,000 for costs incurred to protect the property once a flood or storm surge warning has been issued, with sandbagging given as the example.

This takes about fifteen minutes and a copy of your policy. Start with the declarations page, which lists your named insured, policy period, limits, deductibles and the endorsements you hold. It will tell you whether you bought a water endorsement. It will not tell you what that endorsement excludes — for that you need the endorsement wording itself and the exclusions section of the policy.

Search those documents for four phrases: storm surge, coastal flooding, tidal wave, and seawater. Then work through the questions worth putting to a broker: whether coastal or storm surge coverage is available at your address at all; whether your existing water endorsement responds to seawater or only to freshwater; whether flood-related coverage carries its own separate deductible and whether that deductible is a percentage or a flat amount; what the limits are for the building, the contents and additional living expenses; and whether detached structures are covered on the same basis as the house.

Ask before renewal, not after it. Renewal is the natural moment to change coverage, and it is also the moment at which availability becomes a matter of record.

Toronto homeowners learned the same lesson about sewer backup coverage after a 60-millimetre storm — the endorsement, not the storm, decided the payout.

Coverage, eligibility and pricing vary by insurer and by policy, and nothing in this article determines what any individual policy covers. The wave may turn out to be modest by the time it reaches British Columbia, and a quiet fall is the most likely single outcome. But the paperwork question does not depend on the forecast. It is the same question in a calm October as in a bad one, and it is far easier to answer now.