What Is Happening Right Now
Canada's 2026 wildfire season had a slow start. It is making up for it fast.
After a relatively quiet spring, conditions across the country deteriorated sharply in early July as heat, drought, and high winds converged across a vast swath of northern Ontario, Quebec, British Columbia, and the Northwest Territories. On July 13, numerous wildfires exploded in far northern Minnesota and western Ontario, threatening many communities in both the state and province. The growth was sudden and severe.
By mid-July, nearly 850 wildfires were actively burning across Canada, according to the Canadian Interagency Forest Fire Centre. More than 700 were classified as out of control. Ontario alone had nearly 200 active fires, with 134 of them concentrated in the northwest region and 62 burning without any containment. Since January, Canada has recorded more than 3,137 fires and 1.9 million hectares — roughly 4.7 million acres — burned. That is still below the catastrophic totals of 2023 and 2025, but the trajectory of the past two weeks has alarmed emergency officials.
Who Is Being Forced From Their Homes
The human toll is concentrated in northwestern Ontario, where multiple First Nations and rural communities have been issued mandatory evacuation orders.
As of July 16, evacuation orders were in effect for Armstrong, Whitesand First Nation, Namaygoosisagagun First Nation (also known as Collins First Nation), Lac des Mille Lacs First Nation, Gakijiwanong Anishinaabe Nation (Lac La Croix First Nation), and Gull Bay First Nation. Most evacuees have been relocated south to Thunder Bay. At least one fast-moving fire has already destroyed homes and buildings on Namaygoosisagagun First Nation, north of Thunder Bay.
The scale of the emergency is also affecting rail and road infrastructure. In one of the most striking images of the crisis, a rail worker captured video as a fire closed in on a CN train near Armstrong. "We're encased in flames now," a crew member said. CN confirmed everyone on board made it out safely. Ontario's Ministry of Natural Resources has instituted travel bans across a swath of territory west of Shabaqua around Lac des Mille Lacs, banning public movement through the area to ensure public safety and effective fire suppression.
The Smoke — and the 100 Million Americans It's Reaching
The immediate danger for those near the fires is matched by a slower-moving hazard for everyone else: smoke.
Wildfire smoke from Canada is forecast to blow into the Midwest, Northeast, and Mid-Atlantic, potentially causing poor air quality for around 100 million people through at least Friday, according to the Washington Post, citing NOAA forecasters. Major cities are already feeling it. Thick haze has enveloped Toronto, Boston, and New York City, with some cities temporarily experiencing some of the most polluted air in the world. Chicago residents woke to smoke settling in over Lake Michigan. The sun rising over Toronto's waterfront has turned deep orange for consecutive days.
NASA's NOAA-21 satellite captured images on July 14 showing smoke billowing from Ontario and streaming southeast across much of the Great Lakes region, Quebec, and the U.S. Northeast. The primary smoke corridor runs southeast from the fires, driven by northwest winds with gusts up to 40 kilometres per hour.
What Is Driving the Fires
Ontario's 2026 fire season had three compounding drivers, according to provincial officials and meteorologists:
Extreme heat and drought. Much of northwestern Ontario has been baking under heat warnings for days, with low relative humidity creating bone-dry fuel conditions across the boreal forest. Many parts of the region reached or exceeded dangerous fire-weather thresholds beginning in mid-July, with the combination of high temperatures, low humidity, and wind creating conditions where fire behaviour becomes explosive.
Lightning strikes. A significant wave of lightning activity on July 6 and the days following ignited numerous new fires across the Northwest Region. Some of the region's largest fires predate the July lightning — including ones detected as early as May 31 — but holdover fires combined with the new lightning ignitions produced a sudden surge in active fire counts.
Resource constraints. The scale of the emergency is renewing scrutiny of how Ontario funds its forest firefighting program. Ontario's 2026 budget allocates $150 million to emergency forest firefighting — a figure critics say is insufficient given the pace at which climate-driven fire seasons are intensifying. Firefighting crews have been pulled back from some blazes because extreme fire behaviour has made direct suppression too dangerous. The province has formally requested federal assistance with air support.
Air Quality: Who Is At Risk and What to Do
The Air Quality Health Index (AQHI) is the key number to watch. Anything at 7 or higher is considered high risk — and the general population, regardless of any pre-existing medical issue, should consider avoiding strenuous activities outdoors at that rating.
For those in affected U.S. and Canadian cities, the EPA's AirNow tool (airnow.gov) provides real-time air quality data by location. Smoke containing fine particulate matter (PM2.5) at these concentrations poses the greatest risk to children, older adults, people with asthma or cardiovascular disease, and pregnant women.
Environment Canada recommends:
- Keep all windows and doors closed as much as possible when indoors
- Wear an N95 or KN95 mask if you need to go outside in areas with high AQHI ratings
- Avoid all strenuous outdoor activity until air quality improves
- Run indoor air purifiers with HEPA filters if available
What Comes Next
Environment and Climate Change Canada's weather forecasts point to above-average temperatures across much of Canada from July through August, with dry conditions expected in Manitoba and Northwestern Ontario. The federal government has committed to 10 new wildfire-fighting aircraft and two firefighting support assets as part of a capacity-building effort — but those resources are not fully in place yet.
The broader trajectory is sobering. Ontario has already recorded 453 wildland fires in 2026 compared to 349 in 2025 and a 10-year average of 312. Fire behaviour scientists and climate researchers are watching July carefully: mid-July through August represents the peak of the fire season, and conditions across Canada's boreal forest remain highly volatile.
The Bottom Line
Canada's 2026 wildfire season has shifted from slow start to full crisis in the span of two weeks. Nearly 850 fires are burning from British Columbia to Quebec, with the worst immediate situation in northwestern Ontario — where multiple First Nations communities have been forced to evacuate, homes have been destroyed, and firefighting resources are stretched to their limits. The smoke from these fires is not staying in Canada: a plume affecting roughly 100 million people is moving across the U.S. Northeast and Midwest. With above-normal heat and drought conditions forecast through August, there is no indication the crisis will ease quickly.
