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Wildfires in Viseu
Detected · VIIRS 375 m · Suomi NPP, NOAA-20, NOAA-21 · last 24 hours · updated 2026-10-11 09:22 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 2,740 km² of Viseu at least once. In an average year it detected fire in 320 km², ranking 1st of 20 regions of Portugal.
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 2024, with 796 km² detected; the quietest was 2014, with 58 km². The 2021–2025 average is 18% lower 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.
August, September and October together hold 72% of the fire-days in the record. The single busiest day was 17 September 2024, with detections in 421 cells.
Ground that burns again
Of the 2,740 km² with at least one detection, 14% had detections in three or more different years.
| Years with a detection | km² | Share |
|---|---|---|
| 1 year | 1,750 | 64% |
| 2 years | 616 | 23% |
| 3 to 5 years | 311 | 11% |
| 6 to 10 years | 60 | 2.2% |
| 11 years or more | 0.0 | 0.0% |
The half-degree square with the most fire-days is centred at 40.75, -7.75 and holds 39% of the region's fire-days.
The figures
Show the table
| Year | Detected km² | Fire-days |
|---|---|---|
| 2012 | 458 | 575 |
| 2013 | 723 | 1,033 |
| 2014 | 58 | 68 |
| 2015 | 256 | 307 |
| 2016 | 455 | 650 |
| 2017 | 637 | 830 |
| 2018 | 82 | 94 |
| 2019 | 102 | 123 |
| 2020 | 110 | 135 |
| 2021 | 97 | 117 |
| 2022 | 80 | 92 |
| 2023 | 88 | 102 |
| 2024 | 796 | 1,106 |
| 2025 | 532 | 673 |
Other regions of Portugal
- Vila Real294 km² in an average year
- Braga245 km² in an average year
- Guarda213 km² in an average year
- Viana do Castelo204 km² in an average year
- Porto197 km² in an average year
- Bragança161 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.