Nieni fire, 25 March 2016 Nieni
The fire started on 25 March 2016 in Nieni, Sierra Leone, and satellites saw it burning for 14 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,064 hectares from heat detections, spread across a single municipality.
It is the 95th largest in Northern since 2016 (of 1112 with a page). Number 22 in Sierra Leone in 2016, of 208.
- Burnt area
- 3,064ha
- GWIS perimeter (Copernicus)
- Duration
- 14days
- 25 Mar 2016 – 7 Apr 2016
- Municipalities hit
- 1
- chiefdoms
- Started on
- 25 Mar
- 2016
- Heat detections
- 179
- in a single hotspot: 114 MW
- Danger at start
- 21
- Moderate · FWI index
- Energy released
- 2.5GW
- sum of detected power
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 2 days without rain (1 mm or more) when it started. Rain came after the fire: 4.3 mm on 9 Apr.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Nieni where it started3,084 ha reached on 25 Mar1.4 %
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 Mar | 34.2 °C | 39 % | 24 km/h | 0.0 mm | Moderate 21 |
| 26 Mar | 32.7 °C | 43 % | 24 km/h | 0.0 mm | High 22 |
| 27 Mar | 33.4 °C | 45 % | 27 km/h | 0.0 mm | High 22 |
| 28 Mar | 34.8 °C | 37 % | 26 km/h | 0.1 mm | High 23 |
| 29 Mar | 35.7 °C | 35 % | 31 km/h | 0.2 mm | High 27 |
| 30 Mar | 35.6 °C | 37 % | 40 km/h | 0.0 mm | High 29 |
| 31 Mar | 32.9 °C | 30 % | 31 km/h | 0.0 mm | High 28 |
| 1 Apr | 35.0 °C | 30 % | 26 km/h | 0.0 mm | High 28 |
| 2 Apr | 35.3 °C | 26 % | 34 km/h | 0.0 mm | High 33 |
| 3 Apr | 36.5 °C | 25 % | 32 km/h | 0.0 mm | High 34 |
| 4 Apr | 36.4 °C | 26 % | 32 km/h | 0.0 mm | High 35 |
| 5 Apr | 35.3 °C | 26 % | 36 km/h | 0.0 mm | High 37 |
| 6 Apr | 36.0 °C | 24 % | 37 km/h | 0.0 mm | Very high 38 |
| 7 Apr | 35.1 °C | 29 % | 35 km/h | 0.0 mm | Very high 38 |
| 8 Apr after | 32.3 °C | 48 % | 31 km/h | 0.2 mm | High 27 |
| 9 Apr after | 32.7 °C | 46 % | 30 km/h | 4.3 mm | Low 6 |
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 · 179Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 9,579 haNieni8 March 2022 · 16 days · 18 km away
- 10,359 haNieni3 March 2019 · 18 days · 19 km away
- 6,533 haNieni26 March 2016 · 14 days · 20 km away
- 24,116 haSandor27 February 2019 · 22 days · 26 km away
- 6,826 haSandor26 March 2016 · 15 days · 29 km away
- 11,897 haKunike28 March 2026 · 11 days · 30 km away
Frequently asked questions
- How long did the Nieni fire last?
- GWIS (Copernicus) dates it between 25 March 2016 and 7 April 2016: 14 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 3,064 hectares (30.6 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Nieni (3,084 ha, 1.4 %).
- What was the weather like?
- During the fire the temperature reached 36.5 °C, humidity dropped to 24 % and gusts hit 40 km/h. The fire danger index (FWI) reached 38, class Very 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
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
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.