Toronto Launches Pilot to Combat Urban Heat with Green Roofs

The City of Toronto has announced a new pilot program promoting green roofs on commercial and residential buildings in high-temperature zones, part of a broader strategy to mitigate urban heat effects.

Toronto’s downtown core is about to get greener—literally. The city unveiled a $10 million “Cool City” initiative this afternoon aimed at combating urban heat islands through widespread adoption of green roofs.

Mayor Olivia Chow stated that the initiative will focus on converting concrete rooftops into living ecosystems that cool buildings, reduce energy use, and absorb rainwater. The pilot will begin in neighborhoods like Kensington Market, Liberty Village, and St. James Town.

The move follows alarming data showing that certain urban zones in Toronto are up to 6°C hotter than surrounding areas during heatwaves. By covering buildings with vegetation, the city hopes to reduce the need for air conditioning and curb greenhouse gas emissions.

Grants will cover up to 80% of installation costs for approved projects. If successful, the pilot could expand citywide by 2027.