Toronto floods because intense rainfall can overwhelm rivers, creeks, roads, sewers, basements and stormwater systems, especially in low-lying or heavily paved…
A powerful storm brought large hail, destructive winds and tornado warnings on September 2, 2026, flooding and closing the Don Valley Parkway and several other roads. To…
No single Toronto event defined 2025, but national severe-weather insured losses topped $2.4 billion, the 10th costliest year on record. About 10% of Canadian households…
Torrential rain on July 15-16, 2024 flooded the Don Valley Parkway and closed Billy Bishop Airport's pedestrian tunnel. About 167,000 Toronto Hydro customers lost power;…
A severe storm dropped 126mm of rain at Pearson Airport on July 8, 2013, breaking Hazel's 1954 record. More than 300,000 lost power and about 1,400 GO Transit passengers…
A storm dropped about 103mm of rain on August 19, 2005, washing out a roughly 30-metre section of Finch Avenue West and flooding thousands of basements. Insurers receive…
Toronto's rapid expansion added far more paved surfaces across the region. More hard surfaces mean rainfall runs off faster into drains, creeks and rivers instead of soa…
In the years after Hazel, the province merged local conservation bodies into what became the Toronto and Region Conservation Authority, converting former floodplain neig…
Hurricane Hazel struck Toronto on October 15-16, 1954, dropping over 200mm of rain in 24 hours. The Humber River widened from 65 feet to 350 feet at Woodbridge. The stor…
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