June Storms Cause $1.1 Billion in Insured Damage as Insurers Urge Homeowner Flood Retrofits

The events and their toll

The June losses landed in two clusters, ten days apart. First came the Prairie storms, which the Insurance Bureau of Canada described as a mix of tornadoes, hail, damaging winds, torrential rain and flash flooding across Manitoba and Saskatchewan. Then came the Montreal-area flooding. Neither event was isolated water damage or isolated wind damage; both blended perils in a way that has become typical of Canadian summer storms.

The scale is easier to read in one place:

The damage did not stop at those two events. In Ottawa, residents were still recovering from a severe Canada Day storm that flooded homes, forced evacuations and closed roads, and the bureau said it had staff on the ground and had opened a dedicated helpline for affected residents. For homeowners watching a summer of overlapping storms, the picture is less a single disaster than a season of them, a pattern that recent Ontario and Quebec storm recovery has already made familiar.

Two decades of rising water losses

A single expensive summer could be bad luck. Two decades of them is a trend. Over the last 20 years, flood and water-related insured losses have risen more than 300% compared with the previous two decades, and in recent years water-related events have accounted for 39% of insured catastrophic losses, according to the Insurance Bureau of Canada. Water, in other words, is no longer a minor peril hiding inside the catastrophe numbers. It is close to being the largest slice of them.

The cost trend behind those percentages is just as stark. Since 2009, insurers have paid an average of more than $2 billion a year in catastrophic weather claims, and the last two years pushed well past that average, with $2.4 billion in 2025 and $9.4 billion in 2024. The 2024 figure came during what the bureau called the costliest severe-weather season in Canadian history, a year in which the July flash flood in Toronto alone was later revised upward to more than $909 million. That upward revision is worth holding onto: initial estimates are floors, not ceilings, and today's June numbers may look conservative in a year.

The bureau's own framing is blunt. Flood risk "is no longer a future challenge — it is a current reality affecting Canadians from coast to coast," said Liam McGuinty, its Vice-President of Federal Affairs. For homeowners, that reframe is the point. Billion-dollar catastrophe years have stopped being exceptional, and the market's response — in pricing, in coverage terms, in the decade-long climb in insured losses — is not going to reverse quickly.

Coverage you may assume you have, but might not

Here is the gap that catches people. A standard home insurance policy in Canada does not typically include coverage for overland flooding, which is water that flows across the ground and enters a home. Instead, flood protection generally comes as an endorsement or add-on that has to be requested, and its availability varies by insurer and by the household's assessed flood risk, as Canada.ca explains. Two houses on the same street can carry very different protection depending on which boxes were ticked at renewal.

It gets more granular than a single on-or-off switch. Different kinds of water intrusion are handled by different parts of a policy:

• Overland flood coverage is optional and must be added deliberately.
• Sewer backup is covered only if that specific optional coverage was purchased.
• Groundwater and seepage are typically not covered as standard across home policies.

The practical risk is not only the storm. It is the misread policy. Housing and insurance research has repeatedly found that many homeowners wrongly assume a standard policy covers flooding, and that some who do buy optional coverage still discover after an event that they were underinsured for part of their losses. As climate pressure keeps reshaping coverage across the country, the households most exposed to rising premiums and deductibles are often the ones least certain about what they are actually carrying.

From claims data to prevention

If losses keep climbing and coverage keeps getting more expensive, the only lever left is reducing the damage in the first place. That is the logic behind the bureau's policy asks, which run from strengthening land-use planning and flood-resilient building codes to modernizing stormwater infrastructure and scaling up home retrofit incentives. The through-line is prevention: build in safer places, build to tougher standards, and help existing owners harden the homes they already have.

For homeowners, the most relevant piece is that retrofit does not have to mean reconstruction. A CMHC-supported analysis of Canadian flood-risk solutions found that many effective household defences can often be put in place for less than $250, citing measures such as backwater valves, sump pumps, proper lot grading, clearing eavestroughs and extending downspouts. Set that against the damage they guard against: the federal government's flood-damage prevention guidance flags backwater valves as a high-impact measure and notes that the average cost to repair a flooded basement is over $40,000.

A quick map of the measures insurers and governments keep returning to:

None of this is a step-by-step install guide, and it is not a substitute for professional advice on your specific home. It is context for why the retrofit conversation keeps coming up, and why a broader flood prep checklist tends to pay for itself. The measures are modest. The losses they offset are not.

The Flood Risk Finder and a coverage review

The other half of the bureau's message is about information, and here a federal tool is starting to matter. Public Safety Canada said in April 2026 that technical development of Canada's Flood Risk Finder was complete and that provinces and territories could now opt in, at which point local flood-risk information would become searchable for residents in participating jurisdictions. The tool is designed to let users search by address and see flood risk on a four-point scale from low to extreme, and to identify hazard types such as coastal, rainfall or riverine flooding.

The catch is in that phrase, "participating jurisdictions." The federal site itself notes that the Finder will provide information only for provinces and territories that opt in, which is exactly why the bureau is pressing subnational governments to sign on. A national platform does not automatically mean national coverage on the map, and for many households, access to their own risk data still depends on a provincial decision. It is a live gap in the broader story of stalled national flood coverage.

Until that access is universal, the homeowner-level steps are the same ones flood-readiness guidance has long recommended: review your coverage with an insurance professional before renewal rather than after a loss, and keep backup copies of your policy alongside an inventory of valuables, receipts and photos so a future claim is easier to file. The June numbers are a reminder that the time to understand your coverage is while the weather is calm.