Thunder Bay Fire Rescue battles major multi-structure fire on Simpson Street

THUNDER BAY – NEWS – Update 2 – Thunder Bay Fire Rescue responded to a major early-morning fire in the 600 block of Simpson Street on April 15, with crews facing heavy smoke and flames involving multiple structures. The fire is significant locally because it required a large second-alarm response and drew police and paramedics to one of the city’s busiest south-side corridors.

Reports are that the abandoned building had been a place homeless people had been staying in.

Defensive strategy used as flames engulf multiple structures

Thunder Bay Fire Rescue says crews were dispatched just after 3 a.m. to a structural fire on Simpson Street. The first fire crew to arrive found heavy smoke and flames engulfing multiple structures. Because of the size and complexity of the fire, incident commanders ordered a defensive strategy, meaning firefighters did not enter the buildings because of safety concerns.

Second alarm called as major resources sent to scene

The fire escalated to a second alarm, bringing additional Thunder Bay Fire Rescue resources to the area.

In total, the response included six pumpers, one aerial ladder and one command vehicle. Thunder Bay Fire Rescue says 34 firefighters and one Fire Prevention Officer attended the scene.

EMS and Thunder Bay Police Service were also dispatched to provide scene support and help maintain safety in the area.

Investigation continues

Crews remained on scene following the initial response, and the cause of the fire is under investigation by Thunder Bay Fire Rescue’s Prevention and Investigation Division.
No information was immediately released on injuries or the full extent of the damage.

Public reminded to stay out of vacant buildings

Following the fire, Thunder Bay Fire Rescue reminded the public never to enter vacant buildings or allow unauthorized access to them.

Fire officials also warned that illegal cooking or heating in vacant structures can sharply increase the risk of fire, putting both the public and emergency responders at risk.

Why this fire matters in Thunder Bay

A multi-structure fire on Simpson Street has a wider impact than a routine call because it can affect nearby residents, businesses and traffic in a key south-side area.

Large defensive fires also place heavy demands on fire crews and equipment, especially in the overnight hours when visibility and access can add to the challenge.