How long did the Monte Alegre fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 30 September 2026 to 4 November 2026 (36 days). The perimeter dates it from 1 October 2026 to 3 November 2026.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 12,003 hectares (120.0 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Monte Alegre (12,084 ha, 0.7 %).

Is the Monte Alegre fire still active?

No fire detections since 4 Nov 2026, 05:33 UTC. A lack of detections is not an official extinction.

What was the weather like?

During the fire the temperature reached 36.8 °C, humidity dropped to 26 % and gusts hit 48 km/h. The fire danger index (FWI) reached 35, class High.

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.

BR · Brazil · 2026-09-30 → 2026-11-04

Monte Alegre fire, 30 September 2026 Monte Alegre

Dying down · last detection 4 Nov 2026, 05:33 UTC

The fire started on 30 September 2026 in Monte Alegre, Brazil, and satellites saw it burning for 36 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 12,003 hectares from heat detections, spread across a single municipality.

It is the 194th largest in Pará since 2016 (of 1114 with a page). Number 96 in Brazil in 2026, of 783.

Compare with…

Suggestions: Monte Alegre · 2026 Prainha · 2017 Monte Alegre · 2026

Is it still active?

No detections since 4 Nov 2026, 05:33 UTC. That usually means no flame is visible from space any more, although hotspots may remain. 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: 12,003ha; GWIS perimeter (Copernicus)
Duration: 36days; 30 Sept 2026 – 4 Nov 2026
Municipalities hit: 1; municipalities
Started on: 30 Sept; 2026
Heat detections: 849; in a single hotspot: 203 MW
Danger at start: 20; Moderate · FWI index
Average daily power: 238MW; detected power per day, on average

HOTSPOTS BY DAY 30 Sept4 Nov

Play back 4 Nov 2026

How it evolved, day by day

30 Sept 6 Oct 12 Oct 18 Oct 24 Oct 28 Oct 30 Oct

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

The weather it burned in

37°high

48km/h · peak gust

26%lowest humidity

It had gone 0 days without rain (1 mm or more) when it started.

This area had burned before

20% of the perimeter overlaps earlier fires recorded since 2016: 1,431 ha in 2021, 2,734 ha in 2023. Part of it burned more than once, so the yearly figures add up to more than the 2,397 ha that had burned before.

How big is it?

It burned the equivalent of 7.6% of the area of London (120 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

Monte Alegre 69,377 inhabitants where it started

12,084 ha reached on 30 Sept

0.7 %

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 area0.26 ha

Residents≈ 60

Inside the perimeter there were about 0.26 hectares of built-up land and about 60 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)
30 Sept	33.4 °C	43 %	33 km/h	0.2 mm	Moderate 20
1 Oct	34.1 °C	42 %	38 km/h	0.3 mm	High 24
2 Oct	32.9 °C	40 %	37 km/h	0.5 mm	High 23
3 Oct	34.6 °C	35 %	34 km/h	0.0 mm	High 26
4 Oct	33.9 °C	39 %	34 km/h	0.2 mm	High 27
5 Oct	33.6 °C	47 %	46 km/h	1.7 mm	Moderate 15
6 Oct	33.0 °C	41 %	45 km/h	0.6 mm	High 25
7 Oct	33.8 °C	36 %	37 km/h	0.2 mm	High 27
8 Oct	33.8 °C	39 %	38 km/h	0.3 mm	High 27
9 Oct	34.1 °C	36 %	36 km/h	0.5 mm	High 27
10 Oct	34.2 °C	38 %	36 km/h	0.0 mm	High 28
11 Oct	35.2 °C	35 %	32 km/h	0.0 mm	High 27
12 Oct	35.2 °C	35 %	34 km/h	0.0 mm	High 28
13 Oct	34.1 °C	41 %	35 km/h	1.5 mm	Moderate 19
14 Oct	34.7 °C	37 %	38 km/h	0.2 mm	High 28
15 Oct	34.3 °C	35 %	32 km/h	0.0 mm	High 28
16 Oct	34.6 °C	32 %	36 km/h	0.0 mm	High 31
17 Oct	34.8 °C	41 %	48 km/h	3.4 mm	Low 10
18 Oct	34.4 °C	41 %	26 km/h	2.8 mm	Low 10
19 Oct	34.7 °C	39 %	35 km/h	0.5 mm	High 22
20 Oct	34.6 °C	40 %	38 km/h	1.0 mm	Moderate 21
21 Oct	34.1 °C	39 %	47 km/h	0.7 mm	High 26
22 Oct	34.2 °C	34 %	45 km/h	0.0 mm	High 30
23 Oct	34.1 °C	35 %	37 km/h	0.7 mm	High 26
24 Oct	35.8 °C	31 %	34 km/h	0.1 mm	High 30
25 Oct	35.6 °C	34 %	34 km/h	0.5 mm	High 30
26 Oct	35.4 °C	31 %	37 km/h	0.0 mm	High 30
27 Oct	36.5 °C	26 %	30 km/h	0.0 mm	High 32
28 Oct	36.8 °C	26 %	34 km/h	0.0 mm	High 35
29 Oct	34.6 °C	44 %	35 km/h	0.4 mm	High 29
30 Oct	33.1 °C	38 %	36 km/h	3.0 mm	Moderate 11
31 Oct	34.6 °C	34 %	35 km/h	0.0 mm	High 25
1 Nov	35.8 °C	31 %	32 km/h	0.1 mm	High 30
2 Nov	34.5 °C	43 %	37 km/h	0.4 mm	High 29
3 Nov	33.7 °C	44 %	43 km/h	1.5 mm	Moderate 21
4 Nov	33.1 °C	45 %	35 km/h	1.0 mm	Moderate 19

Before and after, from space

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

↔

Before · 23 Sept 2026

After · 3 Nov 2026

Before After

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 20 October 2026 the air beside the fire reached 65 µg/m³ of PM2.5. That day averaged 38: 2.5 times the WHO daily guideline (15).

PM2.5 peak65 µg/m³

Days over the guideline11 days

PM1068 µg/m³

Optical depth0.96

WHO 15

2829301234567891011121314151617181920212223242526

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 · 849Every 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

All fires in Brazil ›

Frequently asked questions

How long did the Monte Alegre fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 30 September 2026 to 4 November 2026 (36 days). The perimeter dates it from 1 October 2026 to 3 November 2026.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 12,003 hectares (120.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Monte Alegre (12,084 ha, 0.7 %).
Is the Monte Alegre fire still active?: No fire detections since 4 Nov 2026, 05:33 UTC. A lack of detections is not an official extinction.
What was the weather like?: During the fire the temperature reached 36.8 °C, humidity dropped to 26 % and gusts hit 48 km/h. The fire danger index (FWI) reached 35, class High.
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 ›

INPE · Programa Queimadas ↗
IBAMA · Prevfogo ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page · 4 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

3 November 2026 Area: 8,720 → 11,876 ha.
2 November 2026 Area: 8,295 → 8,720 ha.
30 October 2026 Area: 7,824 → 8,295 ha.
29 October 2026 Area: 7,379 → 7,824 ha.

RSS Changes to this page

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?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

Your connection to the fire (optional) Email (optional)

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.
Dates adjusted with the VIIRS detections inside the perimeter, which said 1 October 2026 to 3 November 2026. 849 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.