In Canada, the WUI is rapidly expanding as large cities contend with population growth. But this is putting even more Canadians at risk from potentially detrimental wildfires. The recent, severe wildfires in California’s WUI areas offer a clear warning for Canada, highlighting an urgent need to address the risks associated with these rapidly growing zones.
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Safeguarding strategies
One way of safeguarding Canada’s expanding WUI zones is by using the leaf area index (LAI). This is a measure of vegetation density.
The more dense the vegetation in a particular region (which means it has a higher LAI value), the greater that area’s risk of wildfire. This is because densely wooded areas contain significant fuel sources for wildfires, making them capable of sustaining and intensifying fire spread.
British Columbia’s coastline, Eastern Canada, Southern Ontario and parts of Nova Scotia and New Brunswick (including Halifax and Saint John) are all densely vegetated, highly populated areas that are highly susceptible to wildfire threats — especially during periods of drought and high temperatures.
By pinpointing Canada’s most vulnerable regions, targeted wildfire prevention strategies can be carried out to mitigate risks and enhance community resilience in the face of escalating wildfire threats. This might include reducing the amount of dry vegetation, carrying out controlled burns and building fire-resistant infrastructure.
Canada announced a new goal to build nearly 3.9 million houses by 2031. For these houses to be built, parts of WUI zones will need to be used. It will be important for planning and development policies to ensure resilience against wildfires.