Toliary-II fire, August 2023 Toliary-II
The fire started on 29 August 2023 in Toliary-II, Madagascar, and satellites saw it burning for 8 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,180 hectares from heat detections, spread across a single municipality.
It is the 44th largest in Atsimo-Andrefana since 2016 (of 45 with a page). Number 25 in Madagascar in 2023, of 32.
Compare with…
- Burnt area
- 2,180ha
- GWIS perimeter (Copernicus)
- Duration
- 8days
- 29 Aug 2023 – 5 Sept 2023
- Municipalities hit
- 1
- districts
- Started on
- 29 Aug
- 2023
- Heat detections
- 78
- in a single hotspot: 85 MW
- Average daily power
- 138MW
- 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.
This area had burned before
100% of the perimeter overlaps earlier fires recorded since 2016: 2,014 ha in 2016, 3,560 ha in 2017, 1,251 ha in 2018, 2,201 ha in 2019, 2,324 ha in 2020, 1,217 ha in 2021, 22 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 2,190 ha that had burned before.
- 3,121 ha Toliary-II fire, October 2017 23,015 ha in total; the hectares shown are those it shares with this fire
- 2,052 ha Toliary-II fire, September 2020 20,892 ha in total; the hectares shown are those it shares with this fire
- 1,621 ha Toliary-II fire, October 2019 14,445 ha in total; the hectares shown are those it shares with this fire
- 1,482 ha Toliary-II fire, October 2016 7,724 ha in total; the hectares shown are those it shares with this fire
- 1,217 ha Toliary-II fire, October 2021 14,910 ha in total; the hectares shown are those it shares with this fire
- 439 ha Toliary-II fire, September 2017 3,277 ha in total; the hectares shown are those it shares with this fire
- 260 ha Toliary-II fire, September 2018 13,011 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
-
Toliary-II where it started2,188 ha reached on 26 Aug0.2 %
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.
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 27 August 2023 the air beside the fire reached 13 µg/m³ of PM2.5, but no daily average passed the WHO 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 · 78Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 23,015 haToliary-II10 October 2017 · 30 days · 2 km away
- 20,892 haToliary-IISeptember 2020 · 46 days · 4 km away
- 14,445 haToliary-II14 October 2019 · 31 days · 5 km away
- 14,910 haToliary-II21 October 2021 · 20 days · 7 km away
- 13,011 haToliary-IISeptember 2018 · 14 days · 8 km away
- 12,385 haToliary-IISeptember 2023 · 16 days · 8 km away
Frequently asked questions
- How long did the Toliary-II fire last?
- GWIS (Copernicus) dates it between 29 August 2023 and 5 September 2023: 8 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 2,180 hectares (21.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Toliary-II (2,188 ha, 0.2 %).
- 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 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.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 78 Suomi-NPP VIIRS detections on those dates.
- We have not matched this page with any official record.
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.