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Flood Information

In recent years, Thunder Bay has experienced significant weather events causing flooding. The City of Thunder Bay works closely with the Lakehead Region Conservation Authority who issues flood watches and warnings.

Important contact numbers:

  • To report flooding or for questions or concerns about City roads and other City infrastructure, call Infrastructure & Operations at 625-2195
  • For electrical problems or concerns –  Thunder Bay Hydro at 343-1111 or after hours 343-1002
  • For information about provincially-owned highways – Ministry of Transportation, dial 511
  • 911 should only be called if there is an emergency

Flood Prevention Measures

The City of Thunder Bay is currently offering a Residential Drainage Rebate program to help homeowners with flood prevention measures. If you own a home in the City of Thunder Bay that requires drainage improvements, you may be eligible for a rebate on specific repairs including the installation of a sump pump or backflow prevention valve, or disconnecting your weeping tiles from the sewer system. The program is being delivered through EcoSuperior. For details and information on how to apply, go to


For additional information on how to be prepared for an emergency, go to