N環球 
Military reveals origin of deadly CFB Wainwright fire: automatic grenade launcher range during routine training
Brig.-Gen. Vanessa Hanrahan, head of Canada's military police, confirmed Oct. 22, 2026 that the Alberta base fire that killed four soldiers and injured 39 began on the base's automatic grenade launcher range during routine training. The flames were initially trapped in a munitions danger area firefighters could not enter; a wind shift then turned it deadly. 27 remain hospitalized, 13 in critical condition.
Why it matters
This is the first time the military has pinpointed where the fire started — and explained why firefighters could not attack it directly at first: it sat inside a "permanent danger area" potentially contaminated with unexploded munitions, so crews could only monitor it until a wind shift drove the flames into training troops.
Full report
Canadian Forces Provost Marshal Brig.-Gen. Vanessa Hanrahan told reporters Thursday that the military police investigation shows the Oct. 17 fire started at what is called the automatic grenade launcher (AGL) range at CFB Wainwright, as part of routine training in that area. She did not say whether live firing of explosive rounds ignited the blaze.
The fire initially stayed within "Permanent Danger Area 2" of the range, which under range standing orders may be contaminated with unexploded munitions — preventing firefighters from attacking it directly. It was monitored throughout the day by range control and the base firehall. A subsequent change in wind direction and velocity then significantly increased the fire's intensity and speed, spreading it to another range and overrunning soldiers' positions. Environment Canada confirmed a fast-moving cold front brought gusts of 90 to 130 km/h that day.
Hanrahan said there is no indication that natural gas infrastructure was involved or impacted. As of Oct. 22, 27 injured soldiers remained in hospital, 13 of them in critical condition; 12 others had been treated and released.
Three investigations are running in parallel: the military police probe (independent of the chain of command), a military board of inquiry, and the Alberta Chief Medical Examiner's investigation; the Canadian Forces Fire Marshal is also examining the incident. Prime Minister Mark Carney said Monday that 50 investigators were on the ground. The military now expects the investigation to take longer than the roughly one month initially suggested.
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