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Wildfires in Ontario
Detected · VIIRS 375 m · Suomi NPP, NOAA-20, NOAA-21 · last 24 hours · updated 2026-10-11 06:21 UTC
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Fire history, 2012–2025
Detected · VIIRS S-NPP 375 m · 0.01° cells (~1.1 km) · complete years 2012–2025 · built 2026-09-23
Between 2012 and 2025, VIIRS detected fire in 37,850 km² of Ontario at least once. In an average year it detected fire in 2,970 km², ranking 7th of 13 regions of Canada.
Year by year
Detected area per year, km². Area of 0.01° cells with at least one detection in the year.
The busiest year was 2021, with 9,760 km² detected; the quietest was 2022, with 590 km². The 2021–2025 average is 226% higher than the 2012–2016 average.
Through the year
Share of all fire-days 2012–2025 by month. A fire-day is one cell with a detection on one day.
June, July and August together hold 71% of the fire-days in the record. The single busiest day was 17 July 2021, with detections in 1,888 cells.
Ground that burns again
Of the 37,850 km² with at least one detection, 0.8% had detections in three or more different years.
| Years with a detection | km² | Share |
|---|---|---|
| 1 year | 35,450 | 94% |
| 2 years | 2,090 | 5.5% |
| 3 to 5 years | 195 | 0.5% |
| 6 to 10 years | 38 | 0.1% |
| 11 years or more | 70 | 0.2% |
The half-degree square with the most fire-days is centred at 43.25, -79.75 and holds 11% of the region's fire-days.
The figures
Show the table
| Year | Detected km² | Fire-days |
|---|---|---|
| 2012 | 2,550 | 7,791 |
| 2013 | 1,310 | 4,492 |
| 2014 | 668 | 3,436 |
| 2015 | 1,320 | 4,581 |
| 2016 | 1,490 | 5,461 |
| 2017 | 2,160 | 7,392 |
| 2018 | 3,590 | 10,120 |
| 2019 | 3,490 | 10,113 |
| 2020 | 1,020 | 4,257 |
| 2021 | 9,760 | 28,983 |
| 2022 | 590 | 3,654 |
| 2023 | 5,250 | 14,153 |
| 2024 | 1,660 | 6,800 |
| 2025 | 6,660 | 15,757 |
Other regions of Canada
- British Columbia11,620 km² in an average year
- Northwest Territories10,790 km² in an average year
- Saskatchewan10,300 km² in an average year
- Alberta8,430 km² in an average year
- Manitoba6,670 km² in an average year
- Quebec4,640 km² in an average year
- How these figures are madeDetected area, cells, and the single-satellite record.
Detected area counts every 0.01° cell with at least one VIIRS detection, so a small fire counts as a whole cell and a fire missed by cloud or between passes is absent. Borders: Natural Earth 1:10m. 2012 begins on 20 January.