Burned area
satellite only7,407ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 1 Jan 2025 – 20 Jan 2025
+− cross-check
No official record is matched to this page to compare it with.
SS · South Sudan · –
Nagero fire, 1 January 2025 Nagero
Out · last detection 20 Jan 2025, 11:44 UTC
The fire started on 1 January 2025 in Nagero, South Sudan, and satellites saw it burning for 20 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 7,407 hectares from heat detections, spread across a single municipality.
It is the 153th largest in Western Equatoria since 2016 (of 299 with a page). Number 28 in South Sudan in 2025, of 57.
Use this data
Compare with…
Suggestions: Wau · 2021Nagero · 2016Wau · 2016Nagero · 2017
Use this data
Fire page data · version 2026-10-26matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only20days
1 Jan 2025 to 20 Jan 2025: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 20 Jan 2025, 11:44 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only1 Jan 2025
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 1 Jan 2025
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only291
VIIRS detections at 375 m. Most intense hotspot: 251 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 1 Jan 2025 – 20 Jan 2025
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only804MW
Total radiative power on 9 January 2025; hotspots that day: 73.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 9 Jan 2025
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model54.1FWI · extreme
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 45.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 1 Jan 2025, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model38.3°C · 15% RH
High of 38.3 °C and minimum humidity of 15% on 18 January 2025; gusts of 40 km/h on 1 January 2025.
- Source
- weather model at the fire’s grid cell
- Date
- 1 Jan 2025 – 20 Jan 2025
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
logLast day with fire: 13 January 2025 → 20 January 2025.
-
logStart date: 8 January 2025 → 1 January 2025.
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 26 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 7,407 ha
- Dates
- 1 Jan 2025 – 20 Jan 2025
- Name
- Nagero
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/nagero-2025-01-4?v=2026-10-26A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire nagero-2025-01-4.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025-01-01 | 2 | 6 | 33.7 | 22 | 12 | 17.5 | 40 | 0 | 54.1 | extremo | 1 |
| 2025-01-02 | 7 | 37 | 34.6 | 20.8 | 15 | 15.2 | 36.7 | 0 | 51.7 | extremo | 1 |
| 2025-01-03 | 0 | 0 | 35.5 | 22 | 13 | 13.4 | 32 | 0 | 49.9 | muy_alto | 1 |
| 2025-01-04 | 11 | 41 | 37.3 | 23.4 | 14 | 11.6 | 30.6 | 0 | 48.1 | muy_alto | 1 |
| 2025-01-05 | 1 | 5 | 37.7 | 23.5 | 13 | 12.6 | 32.4 | 0 | 49.5 | muy_alto | 1 |
| 2025-01-06 | 9 | 39 | 36.7 | 24.3 | 13 | 16.3 | 39.2 | 0 | 54.2 | extremo | 1 |
| 2025-01-07 | 14 | 20 | 34.9 | 23 | 11 | 15.1 | 35.3 | 0 | 53 | extremo | 1 |
| 2025-01-08 | 53 | 266 | 35.8 | 21.8 | 12 | 12.4 | 30.6 | 0 | 50.1 | extremo | 1 |
| 2025-01-09 | 73 | 804 | 36.1 | 21.4 | 11 | 10 | 28.1 | 0 | 47.7 | muy_alto | 1 |
| 2025-01-10 | 71 | 675 | 36.7 | 21.1 | 11 | 14.9 | 36.7 | 0 | 53.6 | extremo | 1 |
| 2025-01-11 | 19 | 63 | 35.2 | 22.5 | 12 | 14.8 | 35.3 | 0 | 53.8 | extremo | 1 |
| 2025-01-12 | 21 | 118 | 33.8 | 22 | 14 | 16.2 | 37.1 | 0 | 55.8 | extremo | 1 |
| 2025-01-13 | 4 | 21 | 34.3 | 21.3 | 12 | 13.5 | 32 | 0 | 52.7 | extremo | 1 |
| 2025-01-14 | 1 | 5 | 35.7 | 21.3 | 12 | 13.1 | 33.1 | 0 | 52.5 | extremo | 1 |
| 2025-01-15 | 0 | 0 | 36.7 | 22.9 | 11 | 14.7 | 32 | 0 | 54.7 | extremo | 1 |
| 2025-01-16 | 0 | 0 | 36.8 | 22.4 | 13 | 14.1 | 36.7 | 0 | 54.2 | extremo | 1 |
| 2025-01-17 | 3 | 2 | 37.8 | 24.7 | 16 | 14.4 | 35.6 | 0 | 54.9 | extremo | 1 |
| 2025-01-18 | 0 | 0 | 38.3 | 23.9 | 15 | 12.3 | 32.4 | 0 | 52.5 | extremo | 1 |
| 2025-01-19 | 0 | 0 | 38.2 | 25.3 | 14 | 9.1 | 21.6 | 0 | 49 | muy_alto | 1 |
| 2025-01-20 | 2 | 21 | 36.5 | 26.7 | 17 | 14.2 | 33.8 | 0 | 53.5 | extremo | 1 |
| 2025-01-21 | 0 | 0 | 35.5 | 24.2 | 21 | 12.8 | 32.4 | 0 | 48.1 | muy_alto | 0 |
| 2025-01-22 | 0 | 0 | 37.6 | 23.4 | 11 | 9.9 | 27.4 | 0 | 48 | muy_alto | 0 |
| 2025-01-23 | 0 | 0 | 36.8 | 23.8 | 12 | 12.1 | 33.1 | 0 | 50.8 | extremo | 0 |
| 2025-01-24 | 0 | 0 | 35.9 | 24 | 12 | 16.4 | 38.5 | 0 | 56.3 | extremo | 0 |
| 2025-01-25 | 0 | 0 | 35.7 | 23.1 | 10 | 14.2 | 33.8 | 0 | 53.8 | extremo | 0 |
| 2025-01-26 | 0 | 0 | 36.1 | 22.1 | 8 | 12.7 | 30.6 | 0 | 53.3 | extremo | 0 |
| 2025-01-27 | 0 | 0 | 35.6 | 21.9 | 9 | 14.4 | 33.8 | 0 | 55.6 | extremo | 0 |
| 2025-01-28 | 0 | 0 | 35.4 | 22 | 9 | 14.3 | 33.8 | 0 | 55.8 | extremo | 0 |
| 2025-01-29 | 0 | 0 | 34.8 | 22.2 | 10 | 13.7 | 34.6 | 0 | 55.2 | extremo | 0 |
| 2025-01-30 | 0 | 0 | 35.3 | 22 | 10 | 13.8 | 33.5 | 0 | 55.6 | extremo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 7,407ha
- GWIS perimeter (Copernicus)
- Duration
- 20days
- 1 Jan 2025 – 20 Jan 2025
- Municipalities hit
- 1
- counties
- Started on
- 1 Jan
- 2025
- Heat detections
- 291
- in a single hotspot: 251 MW
- Danger at start
- 54
- Extreme · FWI index
- Average daily power
- 142MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
1 Jan20 Jan
20 Jan 2025
How it evolved, day by day
1 Jan
5 Jan
9 Jan
14 Jan
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
38°high
40km/h · peak gust
11%lowest humidity
It had gone 45 days without rain (1 mm or more) when it started.
This area had burned before
96% of the perimeter overlaps earlier fires recorded since 2016: 5,637 ha in 2016, 3,665 ha in 2017, 1,426 ha in 2018, 3,599 ha in 2019, 1,179 ha in 2020, 547 ha in 2021, 1,202 ha in 2022, 1,704 ha in 2023, 1,737 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 7,127 ha that had burned before.
- 5,534 ha Wau fire, November 2016 737,989 ha in total; the hectares shown are those it shares with this fire
- 2,599 ha Nagero fire, December 2017 9,085 ha in total; the hectares shown are those it shares with this fire
- 1,364 ha Nagero fire, December 2019 35,551 ha in total; the hectares shown are those it shares with this fire
- 882 ha Nagero fire, December 2019 6,213 ha in total; the hectares shown are those it shares with this fire
- 547 ha Nagero fire, December 2021 12,048 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
-
Nagero where it started7,457 ha reached on 1 Jan0.8 %
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 2025Built-up area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (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)
Started with Very dry air: 33 % of the area in South Sudan
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 1 Jan | 33.7 °C | 12 % | 40 km/h | 0.0 mm | Extreme 54 |
| 2 Jan | 34.6 °C | 15 % | 37 km/h | 0.0 mm | Extreme 52 |
| 3 Jan | 35.5 °C | 13 % | 32 km/h | 0.0 mm | Very high 50 |
| 4 Jan | 37.3 °C | 14 % | 31 km/h | 0.0 mm | Very high 48 |
| 5 Jan | 37.7 °C | 13 % | 32 km/h | 0.0 mm | Very high 50 |
| 6 Jan | 36.7 °C | 13 % | 39 km/h | 0.0 mm | Extreme 54 |
| 7 Jan | 34.9 °C | 11 % | 35 km/h | 0.0 mm | Extreme 53 |
| 8 Jan | 35.8 °C | 12 % | 31 km/h | 0.0 mm | Extreme 50 |
| 9 Jan | 36.1 °C | 11 % | 28 km/h | 0.0 mm | Very high 48 |
| 10 Jan | 36.7 °C | 11 % | 37 km/h | 0.0 mm | Extreme 54 |
| 11 Jan | 35.2 °C | 12 % | 35 km/h | 0.0 mm | Extreme 54 |
| 12 Jan | 33.8 °C | 14 % | 37 km/h | 0.0 mm | Extreme 56 |
| 13 Jan | 34.3 °C | 12 % | 32 km/h | 0.0 mm | Extreme 53 |
| 14 Jan | 35.7 °C | 12 % | 33 km/h | 0.0 mm | Extreme 52 |
| 15 Jan | 36.7 °C | 11 % | 32 km/h | 0.0 mm | Extreme 55 |
| 16 Jan | 36.8 °C | 13 % | 37 km/h | 0.0 mm | Extreme 54 |
| 17 Jan | 37.8 °C | 16 % | 36 km/h | 0.0 mm | Extreme 55 |
| 18 Jan | 38.3 °C | 15 % | 32 km/h | 0.0 mm | Extreme 52 |
| 19 Jan | 38.2 °C | 14 % | 22 km/h | 0.0 mm | Very high 49 |
| 20 Jan | 36.5 °C | 17 % | 34 km/h | 0.0 mm | Extreme 54 |
| 21 Jan after | 35.5 °C | 21 % | 32 km/h | 0.0 mm | Very high 48 |
| 22 Jan after | 37.6 °C | 11 % | 27 km/h | 0.0 mm | Very high 48 |
| 23 Jan after | 36.8 °C | 12 % | 33 km/h | 0.0 mm | Extreme 51 |
| 24 Jan after | 35.9 °C | 12 % | 38 km/h | 0.0 mm | Extreme 56 |
| 25 Jan after | 35.7 °C | 10 % | 34 km/h | 0.0 mm | Extreme 54 |
| 26 Jan after | 36.1 °C | 8 % | 31 km/h | 0.0 mm | Extreme 53 |
| 27 Jan after | 35.6 °C | 9 % | 34 km/h | 0.0 mm | Extreme 56 |
| 28 Jan after | 35.4 °C | 9 % | 34 km/h | 0.0 mm | Extreme 56 |
| 29 Jan after | 34.8 °C | 10 % | 35 km/h | 0.0 mm | Extreme 55 |
| 30 Jan after | 35.3 °C | 10 % | 34 km/h | 0.0 mm | Extreme 56 |
Its twins: fires that started in the same weather
It started with an FWI of 54.1, a minimum humidity of 12% and 45 days without rain. Fires in the area that started in weather like this since 2016: 45.
FWI at the start
54.1
Minimum humidity
12 %
Days without rain
45
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Nagero fire, 1 January 2025
7,407 ha
20 days
FWI 54.1
Min. humidity 12 %
Wau fire, December 2021
8,316 ha
8 days
FWI 53.5
Min. humidity 12 %
51 km away, in 2021
First rain (1 mm or more) after it ended: none in the following ten days.
Nagero fire, January 2016
18,322 ha
25 days
FWI 51.1
Min. humidity 12 %
12 km away, in 2016
First rain (1 mm or more) after it ended: none in the following ten days.
Nagero fire, January 2022
8,519 ha
9 days
FWI 53.4
Min. humidity 11 %
15 km away, in 2022
First rain (1 mm or more) after it ended: none in the following ten days.
Tambura fire, December 2021
7,126 ha
14 days
FWI 55.1
Min. humidity 11 %
52 km away, in 2021
First rain (1 mm or more) after it ended: none in the following ten days.
Nagero fire, January 2024
7,089 ha
9 days
FWI 52.9
Min. humidity 13 %
61 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
What happened to them
- 14 days
- median duration
- 7,126 ha
- median area
- 22 %
- went past 10,000 ha
- 1.4 mm
- rain at the end (median; 2 of 45 had it)
It burned an area similar to its twins (7,407 ha against a median of 7,126 ha) and lasted 20 days, against 14 days.
In 43 of 45, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 1.4 mm.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
—first rain
—no rain in ten days
40km/h · max. gust
It was considered over on 20 Jan, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 2 of 45, with a median of 1.4 mm.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2016.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 25 Dec 2024
After · 27 Jan 2025
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 8 January 2025 the air beside the fire reached 59 µg/m³ of PM2.5. That day averaged 43: 2.9 times the WHO daily guideline (15).
PM2.5 peak59 µg/m³
Days over the guideline11 days
PM1070 µg/m³
Optical depth0.77
WHO 15
6 Jan9 Jan12 Jan15 Jan
Good
Fair
Moderate
Poor
Very poor
Extremely poor
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 · 291Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV
Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Nagero fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 1 January 2025 to 20 January 2025 (20 days). The perimeter dates it from 8 January 2025 to 13 January 2025.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 7,407 hectares (74.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Nagero (7,457 ha, 0.8 %).
- What was the weather like?
- During the fire the temperature reached 38.3 °C, humidity dropped to 11 % and gusts hit 40 km/h. The fire danger index (FWI) reached 56, class 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.
- How did the fires that started in similar weather in this area end?
- Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 45. Their median duration was 14 days and their median area 7,126 ha; 22 % went past 10,000 ha. In 43 of 45, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 1.4 mm.
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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 13 January 2025 → 20 January 2025.
- Start date: 8 January 2025 → 1 January 2025.
RSS Changes to this page With cross-checks and a citable version
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 8 January 2025 to 13 January 2025. 291 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.