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Oriximiná fire, 19 September 2026 Oriximiná, Óbidos

Burning · last detection 8 Nov 2026, 17:43 UTC

The fire started on 19 September 2026 in Oriximiná, Brazil, and satellites saw it burning for 51 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 92,150 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 784.

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 8 Nov 2026, 17:43 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
92,150ha
GWIS perimeter (Copernicus)
Duration
51days
19 Sept 2026 – 8 Nov 2026
Municipalities hit
2
municipalities
Started on
19 Sept
2026
Heat detections
1,890
in a single hotspot: 268 MW
Danger at start
34
High · FWI index
Average daily power
356MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 19 Sept8 Nov
8 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 · 1,632 MW · 75 28 Sept 2026 · 387 MW · 63 29 Sept 2026 · 263 MW · 40 30 Sept 2026 · 103 MW · 10 1 Oct 2026 · 85 MW · 15 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 · 1,019 MW · 74 7 Oct 2026 · 137 MW · 34 8 Oct 2026 · 48 MW · 9 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 · 195 MW · 15 15 Oct 2026 · 254 MW · 33 16 Oct 2026 · 390 MW · 34 17 Oct 2026 · 245 MW · 23 18 Oct 2026 · 55 MW · 3 19 Oct 2026 · 70 MW · 9 20 Oct 2026 · 134 MW · 11 21 Oct 2026 · 636 MW · 104 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
23 Sept 9 Oct 20 Oct 30 Oct

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 (204 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

70% 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 58% of the area of London (922 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 28 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.

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 34
20 Sept 34.8 °C 37 % 32 km/h 0.1 mm High 33
21 Sept 35.8 °C 33 % 36 km/h 0.0 mm High 37
22 Sept 36.4 °C 35 % 30 km/h 3.2 mm High 31
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 24
26 Sept 36.4 °C 31 % 32 km/h 0.0 mm High 26
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 12
30 Sept 34.8 °C 44 % 29 km/h 1.4 mm Moderate 17
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 32
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 36
6 Oct 35.8 °C 38 % 37 km/h 0.6 mm Very high 40
7 Oct 36.5 °C 25 % 35 km/h 0.0 mm Very high 39
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 43
10 Oct 36.5 °C 36 % 35 km/h 0.0 mm Very high 39
11 Oct 36.1 °C 33 % 32 km/h 0.0 mm Very high 38
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 35
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 36
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 37
18 Oct 35.7 °C 40 % 36 km/h 8.5 mm Moderate 15
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 42
22 Oct 36.0 °C 29 % 38 km/h 0.0 mm High 38
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 38
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 52
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 36.6 °C 29 % 36 km/h 0.0 mm Very high 50

Before and after, from space

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

Before · 12 Sept 2026
After · 8 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 · 1,890Every 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?
GWIS (Copernicus) dates it between 19 September 2026 and 8 November 2026: 51 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 92,150 hectares (921.5 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 8 Nov 2026, 17:43 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 52, 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 · 4 Changes in area, dates, name, official record or merged pages, compared every night since 2 November 2026.
  1. Area: 86,079 → 92,150 ha.
  2. Area: 82,786 → 86,079 ha.
  3. Area: 87,793 → 82,786 ha.
  4. 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 from the perimeter: the VIIRS detections inside it did not change them. 1,890 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.

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.