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Tenhya fire, 21 October 2025 Tenhya

Out · last detection 21 Oct 2025, 12:53 UTC

The fire started on 21 October 2025 in Tenhya, Niger, and satellites saw it burning for 1 day. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,308 hectares from heat detections, spread across a single municipality.

It is the 14th largest in Zinder since 2016 (of 103 with a page). Number 22 in Niger in 2025, of 161.

Burnt area
3,308ha
GWIS perimeter (Copernicus)
Duration
1day
21 Oct 2025 – 21 Oct 2025
Municipalities hit
1
communes
Started on
21 Oct
2025
Heat detections
51
in a single hotspot: 160 MW
Danger at start
70
Extreme · FWI index
Energy released
2.5GW
sum of detected power

Where it burned

HOTSPOTS BY DAY 21 Oct21 Oct

How it evolved, day by day

21

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
36km/h · peak gust
4%lowest humidity

It had gone 40 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.

What happened to each town

  1. Tenhya where it started
    3,328 ha reached on 21 Oct
    0.3 %

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)
21 Oct 37.8 °C 4 % 36 km/h 0.0 mm Extreme 70
22 Oct after 37.7 °C 4 % 38 km/h 0.0 mm Very extreme 70
23 Oct after 36.9 °C 7 % 45 km/h 0.0 mm Very extreme 78
24 Oct after 37.6 °C 8 % 38 km/h 0.0 mm Very extreme 70
25 Oct after 37.1 °C 8 % 41 km/h 0.0 mm Very extreme 72
26 Oct after 36.9 °C 8 % 40 km/h 0.0 mm Very extreme 74
27 Oct after 36.2 °C 9 % 42 km/h 0.0 mm Very extreme 73
28 Oct after 36.3 °C 7 % 37 km/h 0.0 mm Very extreme 70
29 Oct after 35.8 °C 6 % 37 km/h 0.0 mm Very extreme 71
30 Oct after 35.7 °C 10 % 37 km/h 0.0 mm Extreme 67
31 Oct after 35.3 °C 10 % 33 km/h 0.0 mm Extreme 64

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

Before · 14 Oct 2025
After · 28 Oct 2025

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 · Copernicus

On 20 October 2025 the air beside the fire reached 34 µg/m³ of PM2.5. That day averaged 24: 1.6 times the WHO daily guideline (15).

PM2.5 peak34 µg/m³
Days over the guideline2 days
PM10192 µg/m³
Optical depth0.38
192021222324
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 · 51Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in Niger ›

Frequently asked questions

How long did the Tenhya fire last?
GWIS (Copernicus) dates it between 21 October 2025 and 21 October 2025: 1 day 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 3,308 hectares (33.1 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Tenhya (3,328 ha, 0.3 %).
What was the weather like?
During the fire the temperature reached 37.8 °C, humidity dropped to 4 % and gusts hit 36 km/h. The fire danger index (FWI) reached 70, class Extreme.
Where does this data come from?
From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Niger (OCHA COD-AB). 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.

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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 OCHA COD-AB (IGNN) (Creative Commons Attribution for Intergovernmental Organisations (CC BY-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.