Ulang fire, 17 February 2024 Ulang
The fire started on 17 February 2024 in Ulang, South Sudan, and satellites saw it burning for 26 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 14,721 hectares from heat detections, spread across a single municipality.
It is the 38th largest in Upper Nile since 2016 (of 285 with a page). Number 24 in South Sudan in 2024, of 180.
Compare with…
Suggestions: Ulang · 2016Ulang · 2022Akobo · 2022Ulang · 2016
- Burnt area
- 14,721ha
- GWIS perimeter (Copernicus)
- Duration
- 26days
- 17 Feb 2024 – 13 Mar 2024
- Municipalities hit
- 1
- counties
- Started on
- 17 Feb
- 2024
- Heat detections
- 582
- in a single hotspot: 80 MW
- Danger at start
- 73
- Very extreme · FWI index
- Average daily power
- 288MW
- 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 more than two months without rain (1 mm or more) when it started.
This area had burned before
87% of the perimeter overlaps earlier fires recorded since 2016: 3,345 ha in 2016, 8,879 ha in 2017, 874 ha in 2018, 4,611 ha in 2019, 1,257 ha in 2020, 1,309 ha in 2021, 11,451 ha in 2022, 5,730 ha in 2023. Part of it burned more than once, so the yearly figures add up to more than the 12,862 ha that had burned before.
- 4,767 ha Ulang fire, December 2016 129,779 ha in total; the hectares shown are those it shares with this fire
- 3,214 ha Ulang fire, March 2022 6,279 ha in total; the hectares shown are those it shares with this fire
- 2,524 ha Akobo fire, January 2022 63,860 ha in total; the hectares shown are those it shares with this fire
- 1,580 ha Ulang fire, January 2016 11,109 ha in total; the hectares shown are those it shares with this fire
- 664 ha Ulang fire, March 2023 5,662 ha in total; the hectares shown are those it shares with this fire
- 12 ha Ulang fire, March 2023 10,964 ha in total; the hectares shown are those it shares with this fire
- 5 ha Ulang fire, December 2017 35,904 ha in total; the hectares shown are those it shares with this fire
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
-
Ulang where it started14,816 ha reached on 17 Feb3.0 %
Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance runs from the point marking the centre of each area to the nearest fire: staying a kilometre away does not mean it reached the houses.
People and buildings inside the perimeter
GHSL 2025Inside the perimeter there were about 0.05 hectares of built-up land and about 70 residents (GHSL 2025, satellite-based estimate).
This is an estimate on 100 m cells, made from satellite imagery and census data: it does not mean that homes burned or that anyone was harmed. The perimeter also contains land that never burned. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
Source: Global Human Settlement Layer (GHS-BUILT-S and GHS-POP R2023A), European Commission Joint Research Centre (JRC), © European Union, CC BY 4.0. Sum inside the perimeter computed by WorldFires. human-settlement.emergency.copernicus.eu
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) |
|---|---|---|---|---|---|
| 17 Feb | 40.4 °C | 8 % | 45 km/h | 0.0 mm | Very extreme 73 |
| 18 Feb | 41.0 °C | 9 % | 46 km/h | 0.0 mm | Very extreme 75 |
| 19 Feb | 40.6 °C | 10 % | 45 km/h | 0.0 mm | Very extreme 74 |
| 20 Feb | 40.7 °C | 9 % | 40 km/h | 0.0 mm | Extreme 68 |
| 21 Feb | 41.4 °C | 9 % | 34 km/h | 0.0 mm | Extreme 64 |
| 22 Feb | 40.7 °C | 9 % | 27 km/h | 0.0 mm | Extreme 59 |
| 23 Feb | 40.1 °C | 17 % | 27 km/h | 0.0 mm | Extreme 53 |
| 24 Feb | 40.3 °C | 16 % | 36 km/h | 0.0 mm | Extreme 58 |
| 25 Feb | 41.7 °C | 14 % | 39 km/h | 0.0 mm | Extreme 63 |
| 26 Feb | 42.0 °C | 14 % | 44 km/h | 0.0 mm | Extreme 68 |
| 27 Feb | 42.2 °C | 9 % | 44 km/h | 0.0 mm | Extreme 68 |
| 28 Feb | 41.2 °C | 7 % | 36 km/h | 0.0 mm | Extreme 63 |
| 29 Feb | 40.6 °C | 6 % | 20 km/h | 0.0 mm | Extreme 56 |
| 1 Mar | 41.3 °C | 5 % | 28 km/h | 0.0 mm | Extreme 56 |
| 2 Mar | 41.5 °C | 14 % | 22 km/h | 0.0 mm | Extreme 54 |
| 3 Mar | 42.1 °C | 5 % | 35 km/h | 0.0 mm | Extreme 64 |
| 4 Mar | 42.4 °C | 6 % | 38 km/h | 0.0 mm | Extreme 68 |
| 5 Mar | 40.8 °C | 6 % | 31 km/h | 0.0 mm | Extreme 63 |
| 6 Mar | 39.2 °C | 11 % | 32 km/h | 0.1 mm | Extreme 60 |
| 7 Mar | 40.2 °C | 6 % | 32 km/h | 0.0 mm | Extreme 61 |
| 8 Mar | 41.5 °C | 5 % | 38 km/h | 0.0 mm | Extreme 70 |
| 9 Mar | 42.1 °C | 7 % | 31 km/h | 0.0 mm | Extreme 62 |
| 10 Mar | 41.2 °C | 16 % | 45 km/h | 0.0 mm | Very extreme 70 |
| 11 Mar | 42.3 °C | 14 % | 34 km/h | 0.0 mm | Extreme 61 |
| 12 Mar | 41.3 °C | 17 % | 43 km/h | 0.0 mm | Extreme 69 |
| 13 Mar | 42.7 °C | 15 % | 47 km/h | 0.0 mm | Very extreme 72 |
| 14 Mar after | 42.9 °C | 16 % | 53 km/h | 0.0 mm | Very extreme 78 |
| 15 Mar after | 41.3 °C | 18 % | 40 km/h | 0.0 mm | Extreme 64 |
| 16 Mar after | 40.6 °C | 19 % | 42 km/h | 0.0 mm | Extreme 62 |
| 17 Mar after | 41.8 °C | 18 % | 34 km/h | 0.0 mm | Extreme 56 |
| 18 Mar after | 42.7 °C | 17 % | 41 km/h | 0.2 mm | Extreme 64 |
| 19 Mar after | 39.4 °C | 23 % | 25 km/h | 0.1 mm | Very high 46 |
| 20 Mar after | 40.9 °C | 18 % | 37 km/h | 0.0 mm | Extreme 55 |
| 21 Mar after | 40.4 °C | 22 % | 28 km/h | 0.1 mm | Very high 48 |
| 22 Mar after | 41.0 °C | 11 % | 30 km/h | 0.0 mm | Extreme 54 |
| 23 Mar after | 41.3 °C | 7 % | 30 km/h | 0.0 mm | Extreme 59 |
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.
The smoke
CAMS · CopernicusOn 9 March 2024 the air beside the fire reached 74 µg/m³ of PM2.5. That day averaged 38: 2.5 times the WHO daily guideline (15).
Particles from the Copernicus CAMS model at the centre of the perimeter; these are not measurements in each town. The pale bar is the worst hour, the solid one the daily average.
Open-Meteo.com (CC BY 4.0) · Copernicus Atmosphere Monitoring Service (CAMS)
Detections table · 582Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Ulang fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 17 February 2024 to 13 March 2024 (26 days). The perimeter dates it from 24 February 2024 to 13 March 2024.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 14,721 hectares (147.2 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Ulang (14,816 ha, 3.0 %).
- What was the weather like?
- During the fire the temperature reached 42.7 °C, humidity dropped to 5 % and gusts hit 47 km/h. The fire danger index (FWI) reached 75, class Very extreme.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of South Sudan (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.
Satellite cross-check
History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Start date: 24 February 2024 → 17 February 2024.
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 adjusted with the VIIRS detections inside the perimeter, which said 24 February 2024 to 13 March 2024. 582 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.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 100 m cells), summed inside the perimeter: an estimate of what was there, not a damage count.
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 (Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). 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.