How long did the Nova Mamoré fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 30 July 2021 to 25 August 2021 (27 days). The perimeter dates it from 31 July 2021 to 18 August 2021.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 8,313 hectares (83.1 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Nova Mamoré (8,366 ha, 0.8 %).

What was the weather like?

During the fire the temperature reached 36.3 °C, humidity dropped to 16 % and gusts hit 43 km/h. The fire danger index (FWI) reached 43, class Very 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 · 2021-07-30 → 2021-08-25

Nova Mamoré fire, 30 July 2021 Nova Mamoré

Out · last detection 26 Aug 2021, 05:56 UTC

The fire started on 30 July 2021 in Nova Mamoré, Brazil, and satellites saw it burning for 27 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 8,313 hectares from heat detections, spread across a single municipality.

It is the 59th largest in Rondônia since 2016 (of 300 with a page). Number 197 in Brazil in 2021, of 814.

Compare with…

Suggestions: Nova Mamoré · 2016 Nova Mamoré · 2017 Nova Mamoré · 2018 Nova Mamoré · 2019

Burnt area: 8,313ha; GWIS perimeter (Copernicus)
Duration: 27days; 30 Jul 2021 – 25 Aug 2021
Municipalities hit: 1; municipalities
Started on: 30 Jul; 2021
Heat detections: 529; in a single hotspot: 176 MW
Danger at start: 34; High · FWI index
Average daily power: 261MW; detected power per day, on average

HOTSPOTS BY DAY 30 Jul25 Aug

Play back 26 Aug 2021

How it evolved, day by day

30 Jul 4 Aug 8 Aug 9 Aug 12 Aug 16 Aug 20 Aug 25 Aug

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

The weather it burned in

36°high

43km/h · peak gust

16%lowest humidity

It had gone 32 days without rain (1 mm or more) when it started. Rain came after the fire: 4.3 mm on 29 Aug.

This area had burned before

85% of the perimeter overlaps earlier fires recorded since 2016: 4,656 ha in 2016, 3,597 ha in 2017, 3,537 ha in 2018, 7,827 ha in 2019, 1,107 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 7,093 ha that had burned before.

How big is it?

It burned the equivalent of 5.3% of the area of London (83 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

Nova Mamoré 25,444 inhabitants where it started

8,366 ha reached on 30 Jul

0.8 %

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 2020

Built-up area1.3 ha

Residents≈ 40

Inside the perimeter there were about 1.3 hectares of built-up land and about 40 residents (GHSL 2020, 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)
30 Jul	28.4 °C	21 %	32 km/h	0.0 mm	High 34
31 Jul	31.7 °C	21 %	31 km/h	0.0 mm	High 34
1 Aug	33.2 °C	26 %	41 km/h	0.0 mm	High 37
2 Aug	33.3 °C	21 %	43 km/h	0.0 mm	Very high 40
3 Aug	34.8 °C	19 %	34 km/h	0.0 mm	Very high 40
4 Aug	35.1 °C	20 %	36 km/h	0.0 mm	Very high 41
5 Aug	36.3 °C	16 %	32 km/h	0.0 mm	Very high 43
6 Aug	35.7 °C	20 %	24 km/h	0.0 mm	Very high 42
7 Aug	35.1 °C	22 %	22 km/h	0.0 mm	Very high 40
8 Aug	35.9 °C	22 %	24 km/h	0.0 mm	Very high 39
9 Aug	34.9 °C	29 %	23 km/h	0.0 mm	High 35
10 Aug	35.8 °C	20 %	22 km/h	0.0 mm	High 38
11 Aug	34.2 °C	26 %	31 km/h	0.0 mm	Very high 41
12 Aug	32.3 °C	29 %	36 km/h	0.0 mm	Very high 39
13 Aug	33.6 °C	26 %	36 km/h	0.0 mm	Very high 39
14 Aug	34.9 °C	26 %	34 km/h	0.0 mm	Very high 40
15 Aug	34.7 °C	25 %	33 km/h	0.0 mm	High 37
16 Aug	36.3 °C	23 %	21 km/h	0.0 mm	High 35
17 Aug	35.4 °C	28 %	26 km/h	0.0 mm	High 36
18 Aug	36.1 °C	23 %	32 km/h	0.0 mm	Very high 38
19 Aug	36.3 °C	20 %	24 km/h	0.0 mm	High 37
20 Aug	34.5 °C	31 %	25 km/h	0.0 mm	High 36
21 Aug	34.6 °C	30 %	28 km/h	0.0 mm	High 34
22 Aug	35.2 °C	32 %	30 km/h	0.0 mm	High 36
23 Aug	35.1 °C	32 %	34 km/h	0.0 mm	High 37
24 Aug	35.8 °C	25 %	32 km/h	0.0 mm	High 37
25 Aug	35.0 °C	40 %	40 km/h	0.0 mm	High 35
26 Aug after	35.8 °C	34 %	35 km/h	0.2 mm	High 33
27 Aug after	33.0 °C	35 %	31 km/h	0.2 mm	High 33
28 Aug after	34.4 °C	37 %	34 km/h	0.0 mm	High 35
29 Aug after	33.3 °C	48 %	33 km/h	4.3 mm	Low 7

Before and after, from space

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

↔

Before · 23 Jul 2021

After · 1 Sept 2021

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.

Detections table · 529Every 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 Nova Mamoré fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 30 July 2021 to 25 August 2021 (27 days). The perimeter dates it from 31 July 2021 to 18 August 2021.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 8,313 hectares (83.1 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Nova Mamoré (8,366 ha, 0.8 %).
What was the weather like?: During the fire the temperature reached 36.3 °C, humidity dropped to 16 % and gusts hit 43 km/h. The fire danger index (FWI) reached 43, class Very 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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 18 August 2021 → 25 August 2021.
25 October 2026 Start date: 31 July 2021 → 30 July 2021.

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.

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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?

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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 31 July 2021 to 18 August 2021. 529 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 2020, 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.

Where it burned