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Homes in Climate Danger Zones Could Cost Canadians Billions Per Year

October 5, 2021
Reading time: 3 minutes

Daria Devyatkina/Flickr

Daria Devyatkina/Flickr

1
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This story includes details about the impacts of climate change that may be difficult for some readers. If you are feeling overwhelmed by this crisis situation here is a list of resources on how to cope with fears and feelings about the scope and pace of the climate crisis.

Millions of Canadians could face billions of dollars in damage per year after unknowingly building or buying homes in areas at high risk for climate change impacts like flooding and wildfires, according to a national think tank report that urges investments in emission reductions and climate adaptation to reduce the losses. 

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The release last week from the Canadian Institute for Climate Choices (CICC) combines information on the country’s current stock of buildings, roads, railways, and electricity infrastructure with two different climate models that show average warming in Canada of 3.3° to 4.4°C by 2050, and 4.0° to 7.4°C by 2100, CBC reports.

In the high-emission scenario, flood damage to buildings rises five-fold by 2050 and 10-fold by 2100 to C$13.6 billion per year, CBC says. Temperature and rainfall damage to roads and railways could hit $12.8 billion per year, while damage to power utility infrastructure could triple to $4.1 billion per year.

Those costs could still be brought down by quickly reducing the greenhouse gas emissions driving the climate emergency and funding measures to adapt to climate impacts, the national broadcaster adds. “Ultimately, we’ll need both adaptation and mitigation,” said report co-author, Dale Beugin, the CICC’s vice-president of analysis and research.

But so far the report warns that “there’s little to no public information on current flood, wildfire, or permanent thaw risks,” CBC writes, “let alone taking into account the future” of global heating. “For example, publicly available government data from local conservation authorities generally show only areas at risk of flooding due to rivers and coasts,” even though a private risk database—available for a fee—indicated far greater risk.

The data from JBA Risk Management “showed 325,000 buildings in Canada are at risk of flooding from heavy rainfall and another 625,000 are at risk from flooding due to rivers breaching their banks,” CBC writes. But their owners “have no way of knowing that their properties are at risk of flooding,” the Institute reported.

“There’s pretty poor understanding of climate risks and really poor risk disclosure practices across the country,” report co-author Dylan Clark, a CICC senior research associate, told media. “Information that’s readily available to most decision-makers and investors and consumers does not provide enough information to make informed decisions, and that’s a key barrier here to adaptation.”

While federal dollars have been available in recent years for flood mapping, there are concerns that provincial governments haven’t been moving quickly enough on mapping, emergency planning, or protecting critical infrastructure. Now, the Institute says owners of existing or proposed buildings should be required to disclose climate risks, and that governments should make risk data publicly available for that purpose.

To reduce the risk to lives and properties, the report recommends buying out 10% of the properties in the country’s highest-risk flood zones, a $1.9-billion investment that would save $200 million per year, CBC says. Governments should also build sea walls and elevate buildings to address coastal flooding, adapt asphalt to withstand higher temperatures and heavier rainfalls, install temperature sensors on railway tracks and adjust train speeds based on temperature, and boost the resilience of power grid components.

CBC has further detail and commentary on the report.



in Buildings, Canada, Clean Electricity Grid, Climate & Society, Climate Impacts & Adaptation, Community Climate Finance, Demand & Distribution, Drought, Famine & Wildfires, Health & Safety, Heat & Temperature, Jurisdictions, Severe Storms & Flooding

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