Sengbe fire, 17 March 2023 Sengbe, Nieni
The fire started on 17 March 2023 in Sengbe, Sierra Leone, and satellites saw it burning for 11 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 7,774 hectares from heat detections, spread across 2 municipalities.
It is the 6th largest in Northern since 2016 (of 1112 with a page). The largest in Sierra Leone in 2023, of 160.
Compare with…
Suggestions: Sengbe · 2022Nieni · 2019Sengbe · 2020Nieni · 2018
- Burnt area
- 7,774ha
- GWIS perimeter (Copernicus)
- Duration
- 11days
- 17 Mar 2023 – 27 Mar 2023
- Municipalities hit
- 2
- chiefdoms
- Started on
- 17 Mar
- 2023
- Heat detections
- 385
- in a single hotspot: 114 MW
- Danger at start
- 24
- High · FWI index
- Average daily power
- 780MW
- 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 one day without rain (1 mm or more) when it started. Rain came after the fire: 12.4 mm on 29 Mar.
This area had burned before
69% of the perimeter overlaps earlier fires recorded since 2016: 737 ha in 2016, 1,713 ha in 2017, 1,315 ha in 2018, 1,792 ha in 2019, 1,344 ha in 2020, 2,443 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 5,360 ha that had burned before.
- 1,833 ha Sengbe fire, March 2022 3,066 ha in total; the hectares shown are those it shares with this fire
- 1,589 ha Nieni fire, March 2019 2,221 ha in total; the hectares shown are those it shares with this fire
- 1,326 ha Sengbe fire, March 2020 1,921 ha in total; the hectares shown are those it shares with this fire
- 1,315 ha Nieni fire, March 2018 1,765 ha in total; the hectares shown are those it shares with this fire
- 1,256 ha Nieni fire, March 2017 2,507 ha in total; the hectares shown are those it shares with this fire
- 737 ha Nieni fire, March 2016 1,805 ha in total; the hectares shown are those it shares with this fire
- 537 ha Nieni fire, January 2022 1,456 ha in total; the hectares shown are those it shares with this fire
- 457 ha Sengbe fire, February 2017 1,426 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
-
Sengbe where it started4,150 ha reached on 18 Mar3.5 %
-
3,676 ha reached on 16 Mar1.6 %
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 1.9 hectares of built-up land and about 650 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 Mar | 35.1 °C | 30 % | 30 km/h | 0.0 mm | High 24 |
| 18 Mar | 34.7 °C | 29 % | 28 km/h | 0.0 mm | High 28 |
| 19 Mar | 34.1 °C | 32 % | 28 km/h | 0.0 mm | High 28 |
| 20 Mar | 35.2 °C | 28 % | 30 km/h | 0.0 mm | High 29 |
| 21 Mar | 34.3 °C | 36 % | 30 km/h | 0.0 mm | High 30 |
| 22 Mar | 33.5 °C | 37 % | 36 km/h | 0.0 mm | High 32 |
| 23 Mar | 34.4 °C | 41 % | 35 km/h | 0.0 mm | High 29 |
| 24 Mar | 34.0 °C | 35 % | 23 km/h | 0.0 mm | High 26 |
| 25 Mar | 35.9 °C | 37 % | 26 km/h | 0.9 mm | Moderate 21 |
| 26 Mar | 35.5 °C | 33 % | 22 km/h | 0.9 mm | High 22 |
| 27 Mar | 35.1 °C | 29 % | 33 km/h | 0.4 mm | High 32 |
| 28 Mar after | 35.7 °C | 38 % | 28 km/h | 0.0 mm | High 31 |
| 29 Mar after | 33.2 °C | 49 % | 31 km/h | 12.4 mm | Very low 4 |
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 · 385Every 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 Sengbe fire last?
- GWIS (Copernicus) dates it between 17 March 2023 and 27 March 2023: 11 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 7,774 hectares (77.7 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Sengbe (4,150 ha, 3.5 %); Nieni (3,676 ha, 1.6 %).
- What was the weather like?
- During the fire the temperature reached 35.9 °C, humidity dropped to 28 % and gusts hit 36 km/h. The fire danger index (FWI) reached 32, class High.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Sierra Leone (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 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
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; 2 polygons grouped in this page.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 385 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 ADM3 (Creative Commons Attribution 4.0 (CC BY 4.0)). 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.