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Oriximiná fire, 19 September 2026 Oriximiná, Óbidos

Burning · last detection 14 Nov 2026, 17:32 UTC

The fire started on 19 September 2026 in Oriximiná, Brazil, and satellites saw it burning for 57 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 97,510 hectares from heat detections, spread across 2 municipalities.

This page is probably a fire complex, not a single fire. GWIS merges into one perimeter the fires that touch over weeks, which in large burning seasons can join dozens of separate fires. The total area is reliable; the origin and dates refer to the whole complex.

Other fire pages in the same area and on the same dates:

Number 2 in Brazil in 2026, of 797.

GWIS near-real-time perimeter, from the layer that changed in October 2025: this fire is not compared with fires from earlier years, because since then the GWIS layer gives more and larger perimeters.

Compare with…

Suggestions: Oriximiná · 2025Óbidos · 2023Óbidos · 2018Óbidos · 2023

Is it still active?

Satellites detected fire on 14 Nov 2026, 17:32 UTC. Everything suggests it is still burning. 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.

Burnt area
97,510ha
GWIS perimeter (Copernicus)
Duration
57days
19 Sept 2026 – 14 Nov 2026
Municipalities hit
2
municipalities
Started on
19 Sept
2026
Heat detections
2,038
in a single hotspot: 268 MW
Danger at start
32
High · FWI index
Average daily power
337MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 19 Sept14 Nov
14 Nov 2026

How it evolved, day by day

19 Sept 2026 · 139 MW · 3 20 Sept 2026 · 90 MW · 13 21 Sept 2026 · 204 MW · 41 22 Sept 2026 · 253 MW · 35 23 Sept 2026 · 2,051 MW · 48 24 Sept 2026 · 761 MW · 76 25 Sept 2026 · 448 MW · 63 26 Sept 2026 · 651 MW · 104 27 Sept 2026 · 1,639 MW · 76 28 Sept 2026 · 387 MW · 63 29 Sept 2026 · 263 MW · 40 30 Sept 2026 · 103 MW · 10 1 Oct 2026 · 93 MW · 16 2 Oct 2026 · 1,493 MW · 35 3 Oct 2026 · 224 MW · 50 4 Oct 2026 · 186 MW · 28 5 Oct 2026 · 318 MW · 64 6 Oct 2026 · 1,043 MW · 77 7 Oct 2026 · 137 MW · 34 8 Oct 2026 · 86 MW · 12 9 Oct 2026 · 34 MW · 5 10 Oct 2026 · 61 MW · 11 11 Oct 2026 · 4 MW · 1 13 Oct 2026 · 6 MW · 1 14 Oct 2026 · 196 MW · 16 15 Oct 2026 · 254 MW · 33 16 Oct 2026 · 413 MW · 37 17 Oct 2026 · 265 MW · 30 18 Oct 2026 · 93 MW · 17 19 Oct 2026 · 70 MW · 9 20 Oct 2026 · 134 MW · 11 21 Oct 2026 · 651 MW · 107 22 Oct 2026 · 380 MW · 69 23 Oct 2026 · 954 MW · 48 24 Oct 2026 · 351 MW · 85 25 Oct 2026 · 657 MW · 86 26 Oct 2026 · 192 MW · 39 27 Oct 2026 · 236 MW · 35 28 Oct 2026 · 184 MW · 34 29 Oct 2026 · 239 MW · 34 30 Oct 2026 · 175 MW · 24 31 Oct 2026 · 78 MW · 8 1 Nov 2026 · 158 MW · 26 2 Nov 2026 · 40 MW · 14 3 Nov 2026 · 32 MW · 12 4 Nov 2026 · 58 MW · 15 5 Nov 2026 · 40 MW · 17 6 Nov 2026 · 368 MW · 69 7 Nov 2026 · 472 MW · 75 8 Nov 2026 · 584 MW · 70 9 Nov 2026 · 26 MW · 7 10 Nov 2026 · 270 MW · 37 11 Nov 2026 · 116 MW · 15 12 Nov 2026 · 141 MW · 23 13 Nov 2026 · 90 MW · 15 14 Nov 2026 · 259 MW · 15
23 Sept 14 Oct 26 Oct 7 Nov

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

Fire front film How it spread from one satellite pass to the next (232 passes) and with what wind. Watch the film

The weather it burned in

37°high
43km/h · peak gust
25%lowest humidity

It had gone 5 days without rain (1 mm or more) when it started.

This area had burned before

66% of the perimeter overlaps earlier fires recorded since 2016: 7,710 ha in 2016, 17,376 ha in 2017, 11,286 ha in 2018, 16,981 ha in 2019, 7,129 ha in 2020, 3,224 ha in 2021, 7,061 ha in 2022, 21,146 ha in 2023, 913 ha in 2024, 18,751 ha in 2025. Part of it burned more than once, so the yearly figures add up to more than the 64,110 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 62% of the area of London (975 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

  1. Oriximiná 20,136 inhabitants where it started
    50,851 ha reached on 19 Sept
    0.5 %
  2. Óbidos 52,229 inhabitants
    29,320 ha reached on 27 Sept
    1.0 %

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 2025
Built-up area0.34 ha
Residents≈ 50

Inside the perimeter there were about 0.34 hectares of built-up land and about 50 residents (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) · forecast models, provisional until the ERA5 reanalysis arrives

Day High Min. humidity Peak gust Rain Danger (FWI)
19 Sept 35.2 °C 34 % 33 km/h 0.1 mm High 32
20 Sept 34.8 °C 37 % 32 km/h 0.1 mm High 32
21 Sept 35.8 °C 33 % 36 km/h 0.0 mm High 35
22 Sept 36.4 °C 35 % 30 km/h 3.2 mm High 30
23 Sept 34.8 °C 45 % 31 km/h 5.5 mm Low 10
24 Sept 35.2 °C 40 % 28 km/h 0.2 mm Low 8
25 Sept 35.2 °C 37 % 36 km/h 0.0 mm High 23
26 Sept 36.4 °C 31 % 32 km/h 0.0 mm High 25
27 Sept 35.3 °C 38 % 30 km/h 0.2 mm High 24
28 Sept 35.5 °C 43 % 30 km/h 1.8 mm High 26
29 Sept 34.4 °C 42 % 28 km/h 2.1 mm Moderate 11
30 Sept 34.8 °C 44 % 29 km/h 1.4 mm Moderate 16
1 Oct 33.7 °C 44 % 36 km/h 0.4 mm High 22
2 Oct 35.3 °C 31 % 39 km/h 0.0 mm High 31
3 Oct 36.0 °C 29 % 34 km/h 0.0 mm High 31
4 Oct 35.9 °C 40 % 30 km/h 0.8 mm High 30
5 Oct 35.4 °C 37 % 36 km/h 0.1 mm High 35
6 Oct 35.8 °C 38 % 37 km/h 0.6 mm Very high 39
7 Oct 36.5 °C 25 % 35 km/h 0.0 mm Very high 38
8 Oct 36.4 °C 31 % 35 km/h 0.0 mm High 37
9 Oct 35.5 °C 35 % 38 km/h 0.0 mm Very high 42
10 Oct 36.5 °C 36 % 35 km/h 0.0 mm Very high 38
11 Oct 36.1 °C 33 % 32 km/h 0.0 mm High 37
12 Oct 35.8 °C 33 % 35 km/h 0.0 mm Very high 40
13 Oct 35.8 °C 38 % 32 km/h 3.1 mm High 34
14 Oct 35.9 °C 33 % 32 km/h 0.1 mm High 22
15 Oct 36.3 °C 32 % 36 km/h 0.0 mm High 35
16 Oct 36.5 °C 31 % 32 km/h 0.0 mm High 37
17 Oct 36.8 °C 31 % 35 km/h 0.0 mm High 36
18 Oct 35.7 °C 40 % 36 km/h 8.5 mm Moderate 14
19 Oct 35.5 °C 33 % 37 km/h 0.6 mm Low 8
20 Oct 34.7 °C 39 % 30 km/h 0.1 mm High 22
21 Oct 35.9 °C 31 % 43 km/h 0.0 mm Very high 41
22 Oct 36.0 °C 29 % 38 km/h 0.0 mm High 37
23 Oct 35.9 °C 31 % 35 km/h 0.0 mm High 34
24 Oct 36.8 °C 31 % 34 km/h 0.1 mm High 35
25 Oct 37.4 °C 35 % 34 km/h 0.1 mm High 37
26 Oct 36.7 °C 29 % 35 km/h 0.0 mm Very high 39
27 Oct 36.9 °C 32 % 26 km/h 0.0 mm High 31
28 Oct 36.8 °C 29 % 31 km/h 0.0 mm High 37
29 Oct 37.1 °C 30 % 34 km/h 0.3 mm Very high 38
30 Oct 35.9 °C 33 % 37 km/h 0.0 mm Very high 44
31 Oct 36.1 °C 27 % 32 km/h 0.0 mm Very high 41
1 Nov 37.3 °C 27 % 35 km/h 0.0 mm Very high 46
2 Nov 37.0 °C 34 % 35 km/h 0.0 mm Very high 47
3 Nov 35.7 °C 37 % 40 km/h 0.1 mm Extreme 51
4 Nov 36.7 °C 31 % 32 km/h 0.0 mm Very high 43
5 Nov 36.8 °C 30 % 35 km/h 0.0 mm Very high 46
6 Nov 36.4 °C 30 % 36 km/h 0.2 mm Very high 48
7 Nov 36.0 °C 31 % 38 km/h 0.1 mm Very high 46
8 Nov 36.5 °C 30 % 36 km/h 0.0 mm Very high 49
9 Nov 36.5 °C 35 % 31 km/h 8.5 mm Moderate 14
10 Nov 36.6 °C 32 % 35 km/h 0.0 mm High 30
11 Nov 35.7 °C 37 % 38 km/h 0.1 mm High 38
12 Nov 35.3 °C 36 % 40 km/h 0.1 mm Very high 41
13 Nov 36.1 °C 31 % 35 km/h 0.1 mm High 38
14 Nov 36.2 °C 30 % 37 km/h 0.0 mm High 38

Before and after, from space

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

Before · 12 Sept 2026
After · 14 Nov 2026

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 27 October 2026 the air beside the fire reached 38 µg/m³ of PM2.5. That day averaged 23: 1.6 times the WHO daily guideline (15).

PM2.5 peak38 µg/m³
Days over the guideline8 days
PM1041 µg/m³
Optical depth0.74
17 Sept27 Sept7 Oct17 Oct27 Oct
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 · 2,038Every 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 Brazil

Frequently asked questions

How long did the Oriximiná fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 19 September 2026 to 14 November 2026 (57 days). The perimeter dates it from 19 September 2026 to 13 November 2026.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 97,510 hectares (975.1 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Oriximiná (50,851 ha, 0.5 %); Óbidos (29,320 ha, 1.0 %).
Is the Oriximiná fire still active?
Yes: satellites detected fire on 14 Nov 2026, 17:32 UTC. Check the emergency service for the official status.
What was the weather like?
During the fire the temperature reached 37.4 °C, humidity dropped to 25 % and gusts hit 43 km/h. The fire danger index (FWI) reached 51, class Extreme.
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 · 6 Changes in area, dates, name, official record or merged pages, compared every night since 2 November 2026.
  1. Area: 94,206 → 97,510 ha.
  2. Area: 92,150 → 94,206 ha.
  3. Area: 86,079 → 92,150 ha.
  4. Area: 82,786 → 86,079 ha.
  5. Area: 87,793 → 82,786 ha.
  6. Page published (87,793 ha).

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
What do you think is wrong?

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 193.

How we know this
  • Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 11 polygons grouped in this page.
  • Dates adjusted with the VIIRS detections inside the perimeter, which said 19 September 2026 to 13 November 2026. 2,038 Suomi-NPP VIIRS detections on those dates.
  • We have not matched this page with any official record.
  • Weather: ECMWF IFS model, provisional until the ERA5 reanalysis arrives.
  • 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.

How we build fire pages: methodology

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.