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Nova Mamoré fire, August 2021 Nova Mamoré

Out · last detection 27 Aug 2021, 05:37 UTC

The fire started on 13 August 2021 in Nova Mamoré, Brazil, and satellites saw it burning for 15 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,677 hectares from heat detections, spread across a single municipality.

It is the 202th largest in Rondônia since 2016 (of 300 with a page). Number 625 in Brazil in 2021, of 814.

Compare with…

Suggestions: Nova Mamoré · 2019Nova Mamoré · 2022Nova Mamoré · 2024Nova Mamoré · 2024

Burnt area
3,677ha
GWIS perimeter (Copernicus)
Duration
15days
13 Aug 2021 – 27 Aug 2021
Municipalities hit
1
municipalities
Started on
13 Aug
2021
Heat detections
251
in a single hotspot: 257 MW
Danger at start
37
High · FWI index
Average daily power
415MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 13 Aug27 Aug
27 Aug 2021

How it evolved, day by day

13 Aug 2021 · 14 MW · 3 14 Aug 2021 · 5 MW · 1 17 Aug 2021 · 132 MW · 4 18 Aug 2021 · 33 MW · 4 20 Aug 2021 · 2,213 MW · 48 21 Aug 2021 · 1,282 MW · 84 22 Aug 2021 · 456 MW · 37 23 Aug 2021 · 196 MW · 27 24 Aug 2021 · 562 MW · 28 25 Aug 2021 · 73 MW · 9 26 Aug 2021 · 19 MW · 5 27 Aug 2021 · 1 MW · 1
13 Aug 17 Aug 20 Aug 22 Aug 24 Aug 26 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

37°high
40km/h · peak gust
22%lowest humidity

It had gone 44 days without rain (1 mm or more) when it started. Rain came after the fire: 3.8 mm on 29 Aug.

This area had burned before

58% of the perimeter overlaps earlier fires recorded since 2016: 590 ha in 2016, 1,197 ha in 2017, 496 ha in 2018, 1,799 ha in 2019, 1,310 ha in 2020. Part of it burned more than once, so the yearly figures add up to more than the 2,135 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 2.3% of the area of London (37 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. Nova Mamoré 25,444 inhabitants where it started
    3,701 ha reached on 13 Aug
    0.4 %

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 area< 0.1 ha
Residents< 20

Inside the perimeter there was no noticeable built-up land and almost nobody lived there (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)
13 Aug 33.7 °C 30 % 36 km/h 0.0 mm High 37
14 Aug 35.0 °C 30 % 34 km/h 0.0 mm High 37
15 Aug 35.1 °C 29 % 33 km/h 0.0 mm High 35
16 Aug 37.0 °C 25 % 19 km/h 0.0 mm High 34
17 Aug 36.6 °C 29 % 24 km/h 0.0 mm High 36
18 Aug 37.4 °C 24 % 28 km/h 0.0 mm High 38
19 Aug 37.4 °C 22 % 21 km/h 0.0 mm High 37
20 Aug 35.2 °C 34 % 22 km/h 0.0 mm High 36
21 Aug 35.4 °C 33 % 26 km/h 0.0 mm High 33
22 Aug 36.1 °C 34 % 28 km/h 0.0 mm High 35
23 Aug 35.9 °C 35 % 33 km/h 0.0 mm High 36
24 Aug 36.8 °C 27 % 31 km/h 0.0 mm High 36
25 Aug 36.0 °C 41 % 40 km/h 0.0 mm High 36
26 Aug 37.0 °C 34 % 35 km/h 0.2 mm High 34
27 Aug 33.4 °C 39 % 32 km/h 0.6 mm High 28
28 Aug after 34.6 °C 42 % 34 km/h 0.1 mm High 29
29 Aug after 34.0 °C 51 % 32 km/h 3.8 mm Low 8

Before and after, from space

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

Before · 6 Aug 2021
After · 3 Sept 2021

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 · 251Every 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 Nova Mamoré fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 13 August 2021 to 27 August 2021 (15 days). The perimeter dates it from 20 August 2021 to 27 August 2021.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,677 hectares (36.8 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire only entered Nova Mamoré (3,701 ha, 0.4 %).
What was the weather like?
During the fire the temperature reached 37.4 °C, humidity dropped to 22 % and gusts hit 40 km/h. The fire danger index (FWI) reached 38, 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 ›

Satellite cross-check

History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
  1. Start date: 20 August 2021 → 13 August 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.

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.
  • Dates adjusted with the VIIRS detections inside the perimeter, which said 20 August 2021 to 27 August 2021. 251 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.