THUNDER BAY — Multiple intermodal rail cars derailed near the Pacific Avenue bridge on Thunder Bay’s south side Tuesday afternoon, resulting in a significant diesel spill but no reported injuries.
Thunder Bay Fire Rescue was called to the derailment at about 3 p.m. on July 14, 2026. Fire officials said several rail cars had left the tracks and some had made contact with the bridge.
The cause of the derailment was not immediately known.
Emergency crews secure derailment scene
Thunder Bay Fire Rescue initially dispatched two pumpers and a command vehicle.
The first crew to arrive established a safety perimeter and deployed a hose line as a precaution. A second pumper approached from the east side of the bridge to assess the extent of the derailment.
Firefighters worked with Thunder Bay Police Service officers and railway personnel to determine whether there was any continuing danger to the public.
Officials said members of the public quickly called 911 after seeing the derailment, allowing emergency crews to respond promptly.
Diesel spill reported
A significant amount of diesel fuel was spilled during the derailment. Thunder Bay Fire Rescue said no other hazardous materials were involved.
A third-party environmental contractor was brought in to contain and clean up the spill.
The provincial environment ministry was also notified to ensure the fuel was properly contained and the environmental effects were mitigated.
No information was immediately available about whether diesel entered nearby soil, drainage systems or waterways.
Railway takes control of scene
The derailment scene has been turned over to railway officials, who are responsible for the recovery operation and investigation.
There was no immediate information about the number of cars involved, possible damage to the Pacific Avenue bridge or how long rail operations in the area could be disrupted.
The cause of the derailment remains under investigation.
Thunder Bay Fire Rescue is reminding residents to remain clear of active emergency scenes. Keeping a safe distance allows firefighters, police officers, environmental crews and railway employees to work without additional risks or delays.
