Alta Floresta D'Oeste fire, August 2016 São Francisco do Guaporé, Alta Floresta D'Oeste
The fire started on 18 August 2016 in Alta Floresta D'Oeste, Brazil, and satellites saw it burning for 15 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 23,629 hectares from heat detections, spread across 2 municipalities.
It is the 10th largest in Rondônia since 2016 (of 300 with a page). Number 18 in Brazil in 2016, of 649.
- Burnt area
- 23,629ha
- GWIS perimeter (Copernicus)
- Duration
- 15days
- 18 Aug 2016 – 1 Sept 2016
- Municipalities hit
- 2
- municipalities
- Started on
- 18 Aug
- 2016
- Heat detections
- 776
- in a single hotspot: 120 MW
- Danger at start
- 3
- Very low · FWI index
- Average daily power
- 997MW
- 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: 7.0 mm on 2 Sept.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
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
-
São Francisco do Guaporé 16,286 inhabitants12,579 ha reached on 22 Aug1.1 %
-
Alta Floresta D'Oeste where it started11,231 ha reached on 18 Aug1.6 %
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 2015Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2015, 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.
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) |
|---|---|---|---|---|---|
| 18 Aug | 32.8 °C | 60 % | 20 km/h | 9.5 mm | Very low 3 |
| 19 Aug | 33.8 °C | 55 % | 29 km/h | 8.6 mm | Very low 2 |
| 20 Aug | 34.6 °C | 59 % | 38 km/h | 10.2 mm | Very low 1 |
| 21 Aug | 23.5 °C | 41 % | 58 km/h | 6.7 mm | Very low 2 |
| 22 Aug | 26.9 °C | 35 % | 39 km/h | 0.0 mm | Low 6 |
| 23 Aug | 30.5 °C | 39 % | 24 km/h | 0.0 mm | Low 9 |
| 24 Aug | 34.7 °C | 39 % | 17 km/h | 0.0 mm | Low 10 |
| 25 Aug | 35.1 °C | 39 % | 19 km/h | 0.0 mm | Moderate 12 |
| 26 Aug | 35.6 °C | 40 % | 22 km/h | 0.1 mm | Moderate 12 |
| 27 Aug | 35.1 °C | 44 % | 26 km/h | 0.7 mm | Moderate 12 |
| 28 Aug | 36.0 °C | 40 % | 41 km/h | 2.0 mm | Low 10 |
| 29 Aug | 33.2 °C | 50 % | 42 km/h | 19.4 mm | Very low 1 |
| 30 Aug | 20.4 °C | 69 % | 38 km/h | 5.4 mm | Very low 0 |
| 31 Aug | 31.6 °C | 56 % | 18 km/h | 0.0 mm | Very low 1 |
| 1 Sept | 31.4 °C | 59 % | 18 km/h | 0.6 mm | Very low 3 |
| 2 Sept after | 29.8 °C | 66 % | 20 km/h | 7.0 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.
Detections table · 776Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 13,070 haSão Francisco do Guaporé30 September 2024 · 16 days · 4 km away
- 13,222 haAlta Floresta D'OesteSeptember 2022 · 10 days · 7 km away
- 20,107 haAlta Floresta D'Oeste5 November 2023 · 18 days · 14 km away
- 16,167 haAlta Floresta D'OesteSeptember 2016 · 12 days · 14 km away
- 12,432 haAlta Floresta D'OesteOctober 2021 · 10 days · 16 km away
- 9,805 haSão Francisco do GuaporéOctober 2022 · 11 days · 21 km away
Frequently asked questions
- How long did the Alta Floresta D'Oeste fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 18 August 2016 to 1 September 2016 (15 days). The perimeter dates it from 18 August 2016 to 29 August 2016.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 23,629 hectares (236.3 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: São Francisco do Guaporé (12,579 ha, 1.1 %); Alta Floresta D'Oeste (11,231 ha, 1.6 %).
- What was the weather like?
- During the fire the temperature reached 36.0 °C, humidity dropped to 35 % and gusts hit 58 km/h. The fire danger index (FWI) reached 12, class Moderate.
- Where does this data come from?
- From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Brazil (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.
Emergency number: 193 · Emergency number and official warnings ›
Satellite cross-check
History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 29 August 2016 → 1 September 2016.
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 adjusted with the VIIRS detections inside the perimeter, which said 18 August 2016 to 29 August 2016. 776 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 2015, 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 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.