Burned area
satellite only3,382ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 29 Oct 2023 – 3 Nov 2023
+− cross-check
No official record is matched to this page to compare it with.
BR · Brazil · –
Pimenteiras do Oeste fire, 29 October 2023 Pimenteiras do Oeste, Alto Alegre dos Parecis
Out · last detection 3 Nov 2023, 17:09 UTC
The fire started on 29 October 2023 in Pimenteiras do Oeste, Brazil, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,382 hectares from heat detections, spread across 2 municipalities.
It is the 234th largest in Rondônia since 2016 (of 288 with a page). Number 351 in Brazil in 2023, of 430.
Use this data
Compare with…
Use this data
Fire page data · version 2026-11-05matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only6days
29 Oct 2023 to 3 Nov 2023: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 3 Nov 2023, 17:09 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only29 Oct 2023
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 29 Oct 2023
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only160
VIIRS detections at 375 m. Most intense hotspot: 317 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP + NOAA-20)
- Date
- 29 Oct 2023 – 3 Nov 2023
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only1,510MW
Total radiative power on 3 November 2023; hotspots that day: 89.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 3 Nov 2023
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model10.3FWI · low
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 0.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 29 Oct 2023, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model38.7°C · 29% RH
High of 38.7 °C and minimum humidity of 29% on 3 November 2023; gusts of 43 km/h on 29 October 2023.
- Source
- weather model at the fire’s grid cell
- Date
- 29 Oct 2023 – 3 Nov 2023
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
logStart date: 1 November 2023 → 29 October 2023.
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
logStart date: 29 October 2023 → 1 November 2023.
-
logStart date: 1 November 2023 → 29 October 2023.
-
· reconstructed GHSLPopulation and built-up area computed
Area logged each night
Move the slider to see which area the page published each day.
Versioned permanent link
https://worldfires.org/en/fire/pimenteiras-do-oeste-2023-11-4?v=2026-11-05A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire pimenteiras-do-oeste-2023-11-4.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-10-29 | 18 | 94 | 37.9 | 25.1 | 32 | 14.8 | 42.8 | 1.1 | 10.3 | bajo | 1 |
| 2023-10-30 | 20 | 384 | 35.3 | 25.9 | 45 | 13.8 | 37.4 | 0.6 | 11.2 | moderado | 1 |
| 2023-10-31 | 1 | 4 | 31.1 | 25 | 52 | 10.2 | 23.4 | 0.7 | 3.9 | muy_bajo | 1 |
| 2023-11-01 | 1 | 16 | 35.7 | 24.9 | 37 | 9.5 | 24.8 | 0 | 15.5 | moderado | 1 |
| 2023-11-02 | 31 | 1,348 | 37.3 | 23.8 | 38 | 10.9 | 36.7 | 0.2 | 19.4 | moderado | 1 |
| 2023-11-03 | 89 | 1,510 | 38.7 | 25.7 | 29 | 13.8 | 29.9 | 0.2 | 21 | moderado | 1 |
| 2023-11-04 | 0 | 0 | 33 | 25.1 | 43 | 16.3 | 37.8 | 0 | 27.1 | alto | 0 |
| 2023-11-05 | 0 | 0 | 36.3 | 24 | 36 | 8 | 24.8 | 0 | 21 | moderado | 0 |
| 2023-11-06 | 0 | 0 | 38.2 | 25.8 | 31 | 7 | 15.8 | 0.1 | 18.6 | moderado | 0 |
| 2023-11-07 | 0 | 0 | 40.4 | 26.3 | 31 | 12.2 | 23 | 0.2 | 26.7 | alto | 0 |
| 2023-11-08 | 0 | 0 | 38.1 | 27.1 | 32 | 12.6 | 31 | 0 | 33 | alto | 0 |
| 2023-11-09 | 0 | 0 | 37.6 | 26.9 | 35 | 10 | 29.2 | 0 | 29.5 | alto | 0 |
| 2023-11-10 | 0 | 0 | 35.6 | 26.2 | 44 | 9.7 | 28.8 | 0 | 29 | alto | 0 |
| 2023-11-11 | 0 | 0 | 37.6 | 26.8 | 35 | 12 | 34.2 | 0 | 32.8 | alto | 0 |
| 2023-11-12 | 0 | 0 | 36.8 | 27.7 | 40 | 18.8 | 38.2 | 2.5 | 35 | alto | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 3,382ha
- GWIS perimeter (Copernicus)
- Duration
- 6days
- 29 Oct 2023 – 3 Nov 2023
- Municipalities hit
- 2
- municipalities
- Started on
- 29 Oct
- 2023
- Heat detections
- 160
- in a single hotspot: 317 MW
- Danger at start
- 10
- Low · FWI index
- Average daily power
- 559MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
29 Oct3 Nov
3 Nov 2023
How it evolved, day by day
29 Oct
31 Oct
3 Nov
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
39°high
43km/h · peak gust
29%lowest humidity
It had gone 0 days without rain (1 mm or more) when it started. Rain came after the fire: 2.5 mm on 12 Nov.
This area had burned before
75% of the perimeter overlaps earlier fires recorded since 2016: 1,763 ha in 2016, 1,056 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 2,527 ha that had burned before.
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
-
Pimenteiras do Oeste where it started3,161 ha reached on 29 Oct0.5 %
-
Alto Alegre dos Parecis 11,479 inhabitants244 ha reached on 3 Nov0.1 %
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 2025Built-up area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
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) |
|---|---|---|---|---|---|
| 29 Oct | 37.9 °C | 32 % | 43 km/h | 1.1 mm | Low 10 |
| 30 Oct | 35.3 °C | 45 % | 37 km/h | 0.6 mm | Moderate 11 |
| 31 Oct | 31.1 °C | 52 % | 23 km/h | 0.7 mm | Very low 4 |
| 1 Nov | 35.7 °C | 37 % | 25 km/h | 0.0 mm | Moderate 16 |
| 2 Nov | 37.3 °C | 38 % | 37 km/h | 0.2 mm | Moderate 19 |
| 3 Nov | 38.7 °C | 29 % | 30 km/h | 0.2 mm | Moderate 21 |
| 4 Nov after | 33.0 °C | 43 % | 38 km/h | 0.0 mm | High 27 |
| 5 Nov after | 36.3 °C | 36 % | 25 km/h | 0.0 mm | Moderate 21 |
| 6 Nov after | 38.2 °C | 31 % | 16 km/h | 0.1 mm | Moderate 19 |
| 7 Nov after | 40.4 °C | 31 % | 23 km/h | 0.2 mm | High 27 |
| 8 Nov after | 38.1 °C | 32 % | 31 km/h | 0.0 mm | High 33 |
| 9 Nov after | 37.6 °C | 35 % | 29 km/h | 0.0 mm | High 30 |
| 10 Nov after | 35.6 °C | 44 % | 29 km/h | 0.0 mm | High 29 |
| 11 Nov after | 37.6 °C | 35 % | 34 km/h | 0.0 mm | High 33 |
| 12 Nov after | 36.8 °C | 40 % | 38 km/h | 2.5 mm | High 35 |
Its twins: fires that started in the same weather
It started with an FWI of 10.3, a minimum humidity of 32% and rain the day before. Fires in the area that started in weather like this since 2016: 22.
FWI at the start
10.3
Minimum humidity
32 %
Days without rain
0
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Pimenteiras do Oeste fire, 29 October 2023
3,382 ha
6 days
FWI 10.3
Min. humidity 32 %
Baures fire, August 2024
132,339 ha
75 days
FWI 12.9
Min. humidity 34 %
115 km away, in 2024
First rain (1 mm or more) after it ended: 3.0 mm on 24 Oct.
San Ignacio fire, November 2020
3,120 ha
8 days
FWI 13.8
Min. humidity 33 %
165 km away, in 2020
First rain (1 mm or more) after it ended: 4.4 mm on 9 Nov.
Baures fire, November 2020
4,539 ha
7 days
FWI 16.4
Min. humidity 31 %
52 km away, in 2020
First rain (1 mm or more) after it ended: 6.8 mm on 8 Nov.
Baures fire, August 2022
5,787 ha
16 days
FWI 9.4
Min. humidity 37 %
103 km away, in 2022
First rain (1 mm or more) after it ended: 3.4 mm on 14 Sept.
Magdalena fire, September 2022
35,281 ha
23 days
FWI 12.2
Min. humidity 36 %
142 km away, in 2022
First rain (1 mm or more) after it ended: 4.8 mm on 9 Oct.
What happened to them
- 9 days
- median duration
- 4,760 ha
- median area
- 23 %
- went past 10,000 ha
- 4.8 mm
- rain at the end (median; 20 of 22 had it)
It burned an area similar to its twins (3,382 ha against a median of 4,760 ha) and lasted 6 days, against 9 days.
In 2 of 22, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 4.8 mm.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
2.5 mmfirst rain
12 Nov9 days after it ended
43km/h · max. gust
It was considered over on 3 Nov, and on 12 Nov 2.5 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 20 of 22, with a median of 4.8 mm.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2016.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 22 Oct 2023
After · 10 Nov 2023
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 5 November 2023 the air beside the fire reached 190 µg/m³ of PM2.5. That day averaged 88: 5.8 times the WHO daily guideline (15).
PM2.5 peak190 µg/m³
Days over the guideline8 days
PM10272 µg/m³
Optical depth2.19
WHO 15
30 Oct1 Nov3 Nov5 Nov
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 · 160Every 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 time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Pimenteiras do Oeste fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 29 October 2023 to 3 November 2023 (6 days). The perimeter dates it from 1 November 2023 to 3 November 2023.
- How much area did it burn?
- The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,382 hectares (33.8 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Pimenteiras do Oeste (3,161 ha, 0.5 %); Alto Alegre dos Parecis (244 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 38.7 °C, humidity dropped to 29 % and gusts hit 43 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 Brazil (geoBoundaries). It is not an official report.
- How did the fires that started in similar weather in this area end?
- Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 22. Their median duration was 9 days and their median area 4,760 ha; 23 % went past 10,000 ha. In 2 of 22, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 4.8 mm.
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 · 3 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Start date: 1 November 2023 → 29 October 2023.
- Start date: 29 October 2023 → 1 November 2023.
- Start date: 1 November 2023 → 29 October 2023.
RSS Changes to this page With cross-checks and a citable version
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 1 November 2023 to 3 November 2023. 160 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 2025, 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.