As the GTA faces increasingly intense rainfall and aging infrastructure, a new approach to flood management is gaining momentum. A recent study in Dorval, Québec, led by Lemay and CIMA+, offers a scalable model for Toronto. Instead of costly, large-scale underground pipe replacements, the strategy uses territory-wide mapping to identify priority areas where precise, surface-level interventions—such as rain gardens, bioswales, and landscaped basins—can effectively manage stormwater. By integrating these green solutions into existing parks and streetscapes, municipalities can reduce flood risk while simultaneously enhancing public amenities and expanding urban tree canopies. For Toronto, where densification limits available space, this incremental, data-driven framework provides a cost-effective path to climate adaptation. To see how these small-scale interventions could reshape our local neighbourhoods, read the full report on UrbanToronto.
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