Antsalova fire, October 2026 Antsalova, Belo Sur Tsiribihina
Satellites first detected fire on 21 October 2026 in Antsalova, Madagascar. It was active for 8 days, with 208 heat detections and an area with fire of about 2,394 hectares rebuilt from them, spread across 2 municipalities.
Compare with…
GWIS (Copernicus) has not yet published the perimeter of this fire. It rebuilds it from hotspots, which can take several days, and it does not always arrive. For now the area is the one rebuilt from heat detections (about 14 hectares per pixel). If the perimeter arrives, this page picks it up on its own and keeps the same address.
- Area with fire
- ≈ 2,394ha
- rebuilt from hotspots, no official perimeter yet
- Duration
- 8days
- 21 Oct 2026 – 28 Oct 2026
- Municipalities hit
- 2
- districts
- Started on
- 21 Oct
- 2026
- Heat detections
- 208
- in a single hotspot: 66 MW
- Danger at start
- 12
- Moderate · FWI index
- Average daily power
- 269MW
- 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 0 days without rain (1 mm or more) when it started. Rain came after the fire: 44.5 mm on 29 Oct.
What happened to each town
-
Antsalova where it started1,386 ha reached on 21 Oct0.2 %
-
1,022 ha reached on 21 Oct0.1 %
Area with fire inside each municipality, rebuilt from heat detections (about 14 hectares per VIIRS pixel). An estimate until the official perimeter arrives. 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.
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) · forecast models, provisional until the ERA5 reanalysis arrives
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 21 Oct | 34.0 °C | 46 % | 40 km/h | 1.3 mm | Moderate 12 |
| 22 Oct | 36.6 °C | 38 % | 44 km/h | 0.2 mm | Moderate 21 |
| 23 Oct | 36.7 °C | 45 % | 43 km/h | 2.2 mm | Moderate 13 |
| 24 Oct | 34.4 °C | 48 % | 48 km/h | 0.1 mm | Moderate 18 |
| 25 Oct | 37.5 °C | 38 % | 44 km/h | 1.1 mm | Moderate 20 |
| 26 Oct | 35.3 °C | 44 % | 43 km/h | 1.9 mm | Moderate 12 |
| 27 Oct | 36.9 °C | 40 % | 36 km/h | 6.3 mm | Low 6 |
| 28 Oct | 35.2 °C | 44 % | 46 km/h | 1.6 mm | Low 11 |
| 29 Oct after | 27.0 °C | 76 % | 44 km/h | 44.5 mm | Very low 0 |
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 11 October 2026 the air beside the fire reached 26 µg/m³ of PM2.5. That day averaged 16: 1.1 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 · 208Every 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 Antsalova fire last?
- According to the heat detections seen by satellite, it burned from 21 October 2026 to 28 October 2026 (8 days between the first and the last detection). There is no perimeter yet to date it.
- How much area did it burn?
- There is no perimeter yet. Heat detections rebuild about 2,394 hectares with fire (23.9 km²), a rough figure; GWIS will give its own when it publishes the perimeter, which can take several days.
- Which municipalities burned?
- The fire entered 2 municipalities: Antsalova (1,386 ha, 0.2 %); Belo Sur Tsiribihina (1,022 ha, 0.1 %).
- Is the Antsalova fire still active?
- No fire detections since 28 Oct 2026, 11:36 UTC. A lack of detections is not an official extinction.
- What was the weather like?
- During the fire the temperature reached 37.5 °C, humidity dropped to 38 % and gusts hit 48 km/h. The fire danger index (FWI) reached 21, class Moderate.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Madagascar (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 · 14 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Area: ≈ 2,814 → ≈ 2,394 ha.
- Last day with fire: 24 October 2026 → 28 October 2026.
- Start date: 20 October 2026 → 21 October 2026.
- Area: ≈ 3,458 → ≈ 2,814 ha.
- Start date: 19 October 2026 → 20 October 2026.
- Area: ≈ 2,520 → ≈ 3,458 ha.
- Start date: 18 October 2026 → 19 October 2026.
- Area: ≈ 2,590 → ≈ 2,520 ha.
- Start date: 17 October 2026 → 18 October 2026.
- Area: ≈ 2,478 → ≈ 2,590 ha.
- Start date: 16 October 2026 → 17 October 2026.
- Area: ≈ 2,212 → ≈ 2,478 ha.
- Start date: 15 October 2026 → 16 October 2026.
- Name: Belo Sur Tsiribihina → Antsalova.
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
- No perimeter yet: the area (≈ 2,394 ha) is estimated by counting VIIRS pixels with fire, about 14 ha each.
- Dates of the first and last VIIRS detection of the cluster. 208 Suomi-NPP VIIRS detections on those dates.
- Weather: ECMWF IFS model, provisional until the ERA5 reanalysis arrives.
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.