Toronto City Council Authorizes $48M Accelerated Stormwater Upgrades in Vulnerable Ravine Wards

TORONTO, ON — Following a weekend of severe thunderstorm warnings and localized flash flooding across parts of the Greater Toronto Area, Toronto City Council approved an emergency $48-million capital acceleration package on Sunday morning to upgrade vulnerable ravine stormwater infrastructure.

Infrastructure Scope and Relief Sewers

The funding accelerates Phase 2 of the Basement Flooding Protection Program across high-risk residential catchment zones along the Don River and Highland Creek watersheds in North York, East York, and Scarborough. The civil works include upsizing trunk storm sewer diameters, installing high-capacity stormwater catch basins, and reinforcing culvert headwalls to prevent debris blockages during torrential cloudbursts.

The city will also expand its Basement Flooding Protection Subsidy Program, offering homeowners up to $3,400 to install backwater valves and sump pumps.

Climate Resilience and Municipal Costs

Toronto has experienced an increasing frequency of intense convective rainstorms that overwhelm legacy combined sewer systems, causing basements to flood and untreated storm runoff to bypass into Lake Ontario. Mayor Olivia Chow emphasized that proactive stormwater infrastructure investments protect homeowner property values and reduce municipal emergency response costs.

City water engineers reported that the upgraded culverts and relief mains are designed to handle 1-in-100-year storm events, significantly reducing localized roadway flooding on major arterials including the Don Valley Parkway.

Procurement and Construction

Civil engineering contracts will be tendered through Toronto Water in September 2026, with construction phased across 16 designated residential project areas through 2027 and 2028.