A live grenade training exercise sparked a deadly fire at Canadian Forces Base Wainwright in Alberta on October 17, killing four soldiers and injuring 39 others, military officials confirmed Thursday. The blaze broke out on the base’s automatic grenade launcher range during routine training activities, according to a statement from Brig. Gen. Vanessa Hanrahan, the Canadian Forces Provost Marshal.
The fire initially remained within the range’s designated Permanent Danger Area 2, limiting direct firefighting efforts. However, a sudden shift in wind direction and velocity significantly increased the fire’s intensity and spread rate, officials said. Canadian Prime Minister Mark Carney described the winds as "ferocious," noting the fire "jumped nearly a kilometer in less than a minute" toward soldiers gathered nearby.
The incident involved members of the 3rd Battalion, Princess Patricia’s Canadian Light Infantry, and Army reservists conducting live-fire training. Maj. Gen. Wade Rutland stated Sunday that military officials were aware of the fire for hours but believed it was contained, allowing training to continue before conditions worsened.
As of Thursday, 27 soldiers remained hospitalized, while 12 had been treated and released, according to the Canadian Armed Forces. The Canadian Forces National Investigation Service, supported by the Royal Canadian Mounted Police, has deployed 50 investigators to determine the cause. The probe aims to provide answers "expeditiously and transparently," Carney said.
Officials confirmed no involvement of natural gas infrastructure in the fire. The investigation will examine the training protocols, wind conditions, and response measures during the incident.