The Fire Season Ends. The Aerial Damage Assessment Is Just Starting.

The season closed with numbers

Public Safety Canada's October update, published on 15 October, closed the books on the 2026 season. The national tally passed 5,400 fires and about 4.5 million hectares burned. The Northwest Territories alone accounted for more than a third of that area, and since April more than 33,750 people were forced from their homes, including over 8,800 from First Nations communities.

The leased air tankers are demobilized. The phase that decides what gets rebuilt, which claims get paid and which slopes need watching next spring has barely started, and it runs on documentation. At burn scale, that documentation comes fastest from the air.

Damage assessment is a comparison, not a photo

The recovery file asks a comparative question about every property and asset: what stood here before the fire, and what stands here now. Aerial damage assessment is therefore a baseline problem. A post-event capture is only as useful as the earlier capture it can be laid over, and the two compare cleanly only when they were flown and processed to the same recipe.

There is a working model of this at national scale. In August, the U.S. Department of Energy published an account of its drone team's deployment to the Northern Mariana Islands after Typhoon Sinlaku. The figures describe a programme, not a sortie: 41 missions launched and recovered from 18 separate points on Saipan in late April, roughly 38,000 images, and about 6,000 acres mapped in more than 40 hours of flight. Those frames became an orthomosaic, a geometrically corrected aerial map, pushed through a secure portal and into FEMA's ArcGIS database for its recovery teams. Models on the same platform flagged damaged electrical infrastructure.

"When disaster strikes, getting accurate information quickly can make the difference between a prolonged outage and a faster recovery," said Andrew McClure, who directs the DOE office behind the deployment. The imagery was never the deliverable. The map a utility or an agency could open was.

One detail matters. A second typhoon headed for the same islands as the team prepared to leave, and the deployment was extended by 33 days. The second round of mapping started from a baseline that already existed.

The Canadian rule that sets the flight schedule

Assessment flights cannot simply follow the fire. Transport Canada bars pilots from flying within 9.3 kilometres (5 nautical miles) of a wildfire, and from operating over or inside the perimeter emergency responders have established around an accident, a flood or a fire. The guidance is blunt about why: a drone in the way of response aircraft interferes with the response and the crews on the ground.

That puts post-fire capture on a clock that starts only after restrictions lift, and it runs straight into winter. Ten leased firefighting aircraft, stood up through the Canadian Interagency Forest Fire Centre, worked across nine provinces and territories, flying more than 2,120 hours and making over 14,400 water and retardant drops. An assessment programme shares that airspace and has to plan around the response rather than through it.

What to set up before the next season

• Fix the route and the sensor. One altitude, one overlap, one camera across passes, written into a standard instead of left to habit. Before-and-after subtracts cleanly only when both captures followed the same recipe.
• Control the ground. An orthomosaic with weak ground control will not sit accurately over a property boundary or a structure register, and without that overlay you have a picture rather than evidence.
• Decide the deliverable before the first flight. Receivers usually want a georeferenced orthomosaic plus tiles and an index their own GIS can open, so ask what they read and build to that.
• Book the window early. Snow changes how burned ground reads and spring growth hides it. The gap between the last fire and the first snowfall is short, and shorter in the north.
• Keep the flight file and name the receiver. Dates, aircraft, sensor, crew, area covered and authorisation in one place answers a regulator, an insurer and an internal review. Someone also has to own the imagery after it lands.

The takeaway

A season leaves a long repairs list, and every item on it is easier to fund and defend with dated aerial evidence behind it. The same imagery does quieter work in later years, on erosion, dead standing timber and slope stability. The capture window this autumn is narrow. Imagery not flown before the snow is a baseline that will not exist when the recovery file opens.

Sources: Public Safety Canada, wildfire season October update, 15 October 2026; U.S. Department of Energy, DOE DUCK Squad Expedites Typhoon Sinlaku Recovery, 28 August 2026; Transport Canada, Where to fly your drone.