From the unprecedented flooding of Ottawa to record-setting heatwaves in Toronto and devastating rainstorms, ice storms & windstorms across Southwestern Ontario, extreme weather events are becoming more frequent, impactful and more severe. For both Ontario homeowners and businesses, these shifts are no longer abstract headlines — they’re driving higher insurance premiums, new coverage gaps, impacting availability of insurance, and the need for smarter protection strategies.
Here’s what every property owner and business leader should know about how heatwaves, storms, and climate risks are changing insurance coverage needs.
Ontario’s New Climate Reality: A Snapshot
Ontario is feeling the impacts of climate change on multiple fronts:
- Rising temperatures: 2024 was Ontario’s warmest year on record, with average temperatures 3.0°C above the 20th-century baseline.
- Flooding: Floods remain the most frequent and costly natural hazard in Ontario, with $899 million in insured losses across Southern Ontario in July 2024 1 in 10 Canadian homes are in high-risk flood zones, and many lack adequate flood insurance.
- Windstorms: The 2022 derecho in Ontario caused over $875 million in insured damage — one of Canada’s costliest storm events ever.
- Heatwaves: Extended periods of extreme heat are now common, increasing strain on HVAC systems, accelerating wear on roofs and foundations, and pushing humidity levels high enough to create long-term mold issues in homes and cottages alike.
These events aren’t just happening more often, they’re also more expensive to recover from. According to the Insurance Bureau of Canada, severe weather caused over $3.1 billion in insured damage nationwide in 2023, with Ontario accounting for a significant share. The result is a noticeable shift in how insurance is priced and structured. These realities are forcing insurers and policyholders to rethink traditional coverage models.
How Insurance Is Evolving in Ontario
Traditionally, standard home and commercial insurance policies in Ontario focused on risks like fire, theft, and liability. Today, environmental factors are rapidly increasing and insurance providers are adjusting accordingly.
First, premiums are rising. This isn’t just due to inflation or construction costs. It reflects the increased frequency and financial impacts of severe weather claims, as well as the cost of rebuilding in a more climate-conscious way. Some insurers have introduced special deductibles for storm-related events like hail, wind, and water damage, particularly in areas considered high-risk.
Second, there are more exclusions than before. Overland flooding, for example, is not covered under most basic home insurance policies. It now requires a separate endorsement. Sewer backup protection is another add-on, not a standard feature. Many property owners don’t realize these gaps exist until it’s too late especially in flood-prone regions of Ontario like parts of Ottawa, Windsor, and the Greater Toronto Area.
Third, claims are taking longer. After large-scale storm or flood events (“CAT” events), insurers are often inundated with claims and faced with deploying finite resources & overstretched personnel; this can delay response times, restoration periods and payouts. For property owners, this can mean prolonged periods without access to their homes or businesses.
Property Type and Location Matter More Than Ever
In this changing landscape, the type and location of a property in Ontario (and across Canada) can significantly affect both coverage and cost.
Urban properties may be more vulnerable to sewer backup and flash flooding due to outdated drainage systems. Rural and remote properties, particularly vacation homes or cottages, may face growing wildfire exposure, as Ontario’s wildfire season becomes longer and more intense. Properties near bodies of water are at particular risk of overland flooding. In some cases, insurers are limiting coverage or requiring specific flood mitigation measures before issuing or renewing policies.
Older homes and buildings are also being scrutinized more carefully. Insurers may require updates to plumbing, electrical systems, and roofing before offering comprehensive coverage, especially when the property is in a region with known climate vulnerabilities.
Commercial Properties Face Parallel Challenges
Ontario businesses are facing many of the same climate risks as residential property owners, with added layers of operational complexity. Floods can destroy inventory and equipment. Wind damage can interrupt services or shut down facilities. Prolonged heatwaves can impact employee safety and productivity especially in sectors like construction, manufacturing, and agriculture.
Business interruption coverage, once considered optional by some smaller operators, is now seen as essential to mitigate the financial impacts of business downtime. However, traditional policies may not fully account for supply chain disruption or loss of access due to environmental conditions. Some Ontario businesses are turning to newer Specialty products like parametric insurance, which pays out based on specific, pre-agreed weather triggers (e.g., rainfall levels or wind speeds), offering faster financial relief after extreme events.
Risk Mitigation Is No Longer Optional:
For both homeowners and business owners, mitigating risk is now part of responsible property management and disaster recovery planning. Insurers increasingly look at how well a property is prepared for climate events before determining terms or pricing.
Commercial Climate Adaptation Strategies
- Work with a knowledgeable broker to upgrade your insurance program and maximize your protection against weather risks
- Have an effective Disaster Recovery Plan & Incident Response/Information Security Plan, and test both at least annually
- Conduct a climate risk assessment – Identify property, income, and operational exposures
- Review your current commercial policies for weather exclusions
- Expand business interruption, cyber, supply chain and environmental coverages – With added protection businesses can recover faster after environmental disruption
- Invest in infrastructure upgrades (drainage, fire suppression, ventilation)
- Diversify supply-chain, especially if vendors are in disaster-prone areas
- Consider parametric options
For Ontario Homeowners:
- Review flood, wildfire and storm coverage regularly
- Install backflow valves, sump pumps, and French drains if applicable
- Upgrade to impact-resistance roofing in hail zones
- Use fire-resistant materials in wildfire regions
- Consider solar panels or battery backups to qualify for green discounts
Taking action doesn’t just reduce the likelihood of damage, it may also help keep premiums manageable, improve your insurability and ensure continued access to coverage in high-risk areas.
Looking Ahead
The connection between climate change and insurance is no longer hypothetical. It’s now a tangible factor affecting coverage availability, cost, and reliability.
As risks evolve, so too must the way property owners assess and manage their insurance needs. That means selecting the right insurance broker for your needs, reviewing policies regularly, upgrading coverage when available, asking the right questions about coverage limits and exclusions, in essence - staying informed about how climate trends are impacting different regions across the province and country.
Insurance won’t stop the storms or heatwaves but the right coverage, combined with thoughtful risk mitigation, can make the recovery easier, faster, and far less costly – offering you peace of mind in challenging times.