A fast-moving fire at one of Canada’s busiest military training sites has left the country reeling, with Prime Minister Mark Carney confirming four service members dead and dozens more seriously injured at Canadian Forces Base Wainwright in Alberta — an event he called among the military’s worst peacetime tragedies on Canadian soil.
Mr Carney said the families of those killed had been notified and warned that the situation remained fluid as officials continued to assess the full scale of the incident.
Senior military leaders and government officials are expected to give a detailed briefing later on Sunday at CFB Wainwright, the prime minister said.
“The nation is in mourning for those brave members of our armed services,” he said.
Canadian broadcaster CBC reported at least 7 people had died, however the national defence department had said they could not confirm full casualty details until the process of informing next of kin was complete.
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Earlier in the day, Canada’s defence minister said the blaze had killed and injured an unspecified number of people, as reports indicated large numbers of wounded were being taken to hospitals.
Emergency crews worked late into the night as powerful winds drove flames beyond the boundaries of Canadian Forces Base Wainwright into the surrounding rural area.
A doctor in Edmonton — about 200km northwest — told CBC that patients were being dispersed among hospitals across the city after healthcare facilities closer to the base became “completely overwhelmed” by the surge in people needing treatment.
“This number of patients would overwhelm the city of Edmonton,” Dr Warren Thirsk, an emergency department physician at the Royal Alexandra Hospital, said.
“It is more patients than any of us want to count right now. It’s a disaster. It’s a one in every 15 to 25-year disaster.”
The Canadian flag will fly at half-mast on federal buildings across Canada. All Canadians stand with the service members at CFB Wainwright, their families, and their community.
— Mark Carney (@MarkJCarney) October 18, 2026
Mr Carney said Canadian flags would be lowered to half-mast on federal buildings nationwide to honour those affected.
“All Canadians stand with the service members at CFB Wainwright, their families, and their community,” Mr Carney said.
Acute Care Alberta said several hospitals across the province had activated a Code Orange — an emergency designation used when multiple severely injured patients require coordinated medical care.
The agency said emergency medical resources were under extreme strain, leaving extremely few ambulances available in the Edmonton area.
It urged the public to avoid the University of Alberta Hospital emergency department if possible.
Wainwright Mayor Bruce Pugh said the town’s small hospital was never built for a mass-casualty event, while commending local medical staff for their response under pressure.
He said helicopters and planes were being used to move patients to other facilities for treatment.
Late on Saturday, at least 10 ambulances were seen parked in and around the Wainwright health centre as paramedics and soldiers moved quickly between vehicles and entrances. One patient was observed being loaded into an ambulance.
The town of Wainwright, near the base, has about 7,000 residents.
Defence minister David McGuinty said the Royal Canadian Mounted Police were involved and characterised the situation as “very, very active and delicate”.
He said officials were still working to establish what occurred and that more information was expected as the response continued.
The Royal Canadian Mounted Police (RCMP) said officers were called shortly after 4pm local time following reports of a fire inside the training area at the base.
Firefighters faced dangerous conditions as a windstorm swept parts of the province, with gusts reaching 95km/h. The winds toppled some trees and sent signs flying, while rubbish bins rolled down streets.
By 11pm, the Municipal District of Wainwright said on social media the fire was being held and that property and critical infrastructure were protected. No evacuation order was issued for residents.
Mr McGuinty said armed forces members were on the scene and that RCMP were also involved.
“This is an active and delicate situation and soon to be an active and delicate investigation.”
Saskatchewan premier Scott Moe said his province was sending help to Alberta, though he did not specify which resources were being deployed.
“Our thoughts are with all the brave women and men affected,” Mr Carney said earlier in a social media post.
Alberta premier Danielle Smith called the blaze “significant and tragic” and said it was impacting many members of the military.
CFB Wainwright is one of Canada’s busiest military training bases, where soldiers prepare for combat operations.
It hosts the Canadian Manoeuvre Training Centre, known for realistic battlefield exercises, and the 3rd Canadian Division Training Centre, which delivers military training.
Canadian Conservative opposition leader Pierre Poilievre said he had spoken with Mr Carney and the defence minister to offer support to those affected.
“Pray for Wainwright, everyone,” Mr Poilievre said in a social media post, urging residents to follow emergency directions and keep roads clear for first responders.
The incident also disrupted advance voting ahead of Monday’s referendum on whether Alberta should begin a process that could lead to independence from Canada.
Elections Alberta said two polling locations, in Lloydminster and Vermilion, closed early on Saturday and the ballots were transported securely.
