Regulatory flood line mapping defines the 100-year storm event for lakes and rivers in the Toronto area.

Predicted high water levels and historical observations from Hurricane Hazel can be used to estimate risk.

Update Alert:

Portions of Duffins Creek as well as other flood plain mapping are currently in “DRAFT” status and are temporarily unavailable for purchase. Check the file info on MapWarehouse to confirm the map status is “FINAL” to ensure a successful transaction.

If you’ve purchased a draft file or your file contains no data, please contact us for help.

How To Purchase


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First Base Solutions can help you retrieve flood line mapping found on MapWarehouse covering large or complex areas. Contact customer service for assistance.
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Floodplain Coverage Map

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