The Fort McMurray Fire (Horse River Fire)
The 2016 Fort McMurray Fire, nicknamed The Beast, forced the largest wildfire evacuation in Alberta's history: about 88,000 people fled as flames entered the city on May 3. It destroyed roughly 2,400 structures and became the costliest disaster in Canadian history for insurers.
Shaded circle = 1,456,810 acres burned
The shaded circle covers the same area as the fire’s recorded footprint, centered near its origin. Real perimeters were irregular and wind-driven.
Key facts
What happened
The fire started on May 1, 2016 southwest of Fort McMurray, the hub of Alberta's oil sands region, during an unusually hot, dry spring following a strong El Nino winter. On May 3, driven by 40 C heat and shifting winds, it jumped the Athabasca River and entered the city, forcing a full evacuation down a single highway lined with flames.
The fire burned about 589,552 hectares (1.46 million acres) across Alberta and into Saskatchewan before being declared under control on July 5. It smoldered in ground fuels through the winter and was not declared fully extinguished until August 2017.
Why it matters
Fort McMurray was a preview of boreal-forest fire risk in a warming climate: an early-season megafire threatening a modern city of 90,000. It knocked roughly a quarter of Canada's oil production offline for weeks and produced insured losses of about C$3.7 billion, still the largest in Canadian history.
Remarkably, no one died in the fire itself, a result credited to decisive evacuation orders and disciplined driving through fire-lined highways.
Frequently asked questions
How many people were evacuated from Fort McMurray?
About 88,000 people, the entire city plus surrounding communities, in the largest wildfire evacuation in Alberta's history.
What caused the Fort McMurray fire?
Investigators concluded it was most likely human-caused, given the location and lack of lightning, but no official cause or responsible party was ever determined.
How costly was the fire?
Insured losses reached about C$3.7 billion, Canada's costliest insured disaster, with total economic impact estimated near C$9 billion.
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Sources
Facts checked against the sources above. Figures such as costs and death tolls follow the most widely accepted official counts.