Nwoya fire, 25 December 2016 Nwoya
The fire started on 25 December 2016 in Nwoya, Uganda, and satellites saw it burning for 4 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,891 hectares from heat detections, spread across a single municipality.
It is the 130th largest in Northern Region since 2016 (of 1377 with a page). Number 28 in Uganda in 2016, of 269.
The power measured by the satellite is low (27.9 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Compare with…
- Burnt area
- 2,891ha
- GWIS perimeter (Copernicus)
- Duration
- 4days
- 25 Dec 2016 – 28 Dec 2016
- Municipalities hit
- 1
- counties
- Started on
- 25 Dec
- 2016
- Heat detections
- 81
- in a single hotspot: 28 MW
- Danger at start
- 30
- High · FWI index
- Average daily power
- 161MW
- detected power per day, on average
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone 9 days without rain (1 mm or more) when it started.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Nwoya where it started2,910 ha reached on 25 Dec0.7 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
The weather day by day
ECMWF ERA5 reanalysis at the fire location, the standard reference for past weather, and the Canadian Fire Weather Index (the same system Copernicus uses), computed by WorldFires from that data. Days after the fire run until the first rain.
Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 25 Dec | 37.5 °C | 17 % | 32 km/h | 0.0 mm | High 30 |
| 26 Dec | 36.8 °C | 20 % | 36 km/h | 0.0 mm | High 31 |
| 27 Dec | 36.5 °C | 15 % | 23 km/h | 0.0 mm | High 29 |
| 28 Dec | 35.1 °C | 19 % | 26 km/h | 0.0 mm | High 31 |
| 29 Dec after | 35.1 °C | 20 % | 24 km/h | 0.0 mm | High 32 |
| 30 Dec after | 34.7 °C | 27 % | 25 km/h | 0.0 mm | High 28 |
| 31 Dec after | 34.2 °C | 33 % | 31 km/h | 0.6 mm | High 21 |
| 1 Jan after | 34.6 °C | 25 % | 35 km/h | 0.0 mm | High 29 |
| 2 Jan after | 35.1 °C | 25 % | 27 km/h | 0.0 mm | High 28 |
| 3 Jan after | 33.5 °C | 33 % | 27 km/h | 0.0 mm | High 27 |
| 4 Jan after | 35.3 °C | 23 % | 22 km/h | 0.0 mm | High 27 |
| 5 Jan after | 38.0 °C | 10 % | 20 km/h | 0.0 mm | High 36 |
| 6 Jan after | 38.5 °C | 5 % | 34 km/h | 0.0 mm | Very high 46 |
| 7 Jan after | 37.1 °C | 13 % | 26 km/h | 0.0 mm | Very high 42 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.
Detections table · 81Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 10,795 haBuliisa6 January 2019 · 9 days · 16 km away
- 13,858 haKibanda9 February 2016 · 7 days · 18 km away
- 16,324 haNwoya6 January 2026 · 17 days · 19 km away
- 9,718 haBuliisa3 January 2026 · 17 days · 19 km away
- 10,951 haNwoya28 January 2016 · 18 days · 22 km away
- 9,055 haBuliisa15 December 2016 · 16 days · 22 km away
Frequently asked questions
- How long did the Nwoya fire last?
- GWIS (Copernicus) dates it between 25 December 2016 and 28 December 2016: 4 days between the first and last heat detection of the perimeter.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,891 hectares (28.9 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Nwoya (2,910 ha, 0.7 %).
- What was the weather like?
- During the fire the temperature reached 37.5 °C, humidity dropped to 15 % and gusts hit 36 km/h. The fire danger index (FWI) reached 31, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Uganda (geoBoundaries). It is not an official report.
Where to verify it
A satellite detection is not an official report. Final figures and the fire’s status are published by each country’s emergency service.
Emergency number: 999 · 112
Satellite cross-check
Does something look wrong on this page?
This page is built from satellite data and official records, and it sometimes gets things wrong: the wrong dates, the wrong town, two fires merged into one, or something that was not a wildfire at all. If you know this fire first-hand (you live nearby, saw it, fought it or reported on it), tell us what really happened and we will check it.
Report an error
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 81 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
- Weather: Copernicus ERA5 reanalysis at the fire location, in cells of about 25 km.
Where this data comes from
The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Municipal boundaries come from geoBoundaries ADM2 (Public Domain). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ from each country’s official figure.