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Basement Flooding Downtown
In 2013, City Council approved the development of comprehensive plans across 67 areas in the city to reduce the risk of flooding. The study on areas 42, 44 and 62 (downtown) began in 2019, and covers the area from St. Clair Avenue West to Lake Ontario and Jane Street to the Don Valley Parkway. These areas have interconnected sewer and drainage systems that span several wards across the city.
City staff have studied the factors that contribute to surface and basement flooding in the area, and have developed recommended solutions to address these issues, mainly by increasing sewer conveyance capacity, which is the ability to carry large amounts of water through the sewer system.
While the City’s current sewer system is effective in managing rainfall from most storm events, the recommended solutions outlined in the map will help protect against flooding during extreme storm events.
The recommended solutions are not yet funded by the City. Further detailed engineering work must be completed to confirm project details, which may take a number of years to complete. This detailed engineering work and funding approval would be needed before any construction takes place
Learn more about the Basement Flooding Protection Program for the downtown area at toronto.ca/DowntownBF
How to use this map:
- The map shows the recommended solutions to address surface and basement flooding in the area.
- See map legend at the bottom right, and explanations in the left sidebar.
- Zoom in to your neighbourhood and look over the streets you are familiar with.
- Please note, this map is not for commenting about flooding on private property, road user behaviour or police enforcement. To report a maintenance, signal, barrier, sign, or other safety issue, please call 311.
NOTE: This tool cannot be made accessible and does not work with assistive technologies. If you require accessible alternatives, or have any questions or difficulties completing this survey, please contact:
Basement Flooding Protection Program
Email: floodingstudy@toronto.ca
Telephone: 416-397-5559