How long did the Apuí fire last?

GWIS (Copernicus) dates it between 10 August 2017 and 20 August 2017: 11 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 5,627 hectares (56.3 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Apuí (5,658 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 40.9 °C, humidity dropped to 13 % and gusts hit 38 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.

BR · Brazil · 2017-08-10 → 2017-08-20

Apuí fire, 10 August 2017 Apuí

Out · last detection 20 Aug 2017, 16:57 UTC

The fire started on 10 August 2017 in Apuí, Brazil, and satellites saw it burning for 11 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 5,627 hectares from heat detections, spread across a single municipality.

It is the 130th largest in Amazonas since 2016 (of 450 with a page). Number 391 in Brazil in 2017, of 994.

Burnt area: 5,627ha; GWIS perimeter (Copernicus)
Duration: 11days; 10 Aug 2017 – 20 Aug 2017
Municipalities hit: 1; municipalities
Started on: 10 Aug; 2017
Heat detections: 484; in a single hotspot: 193 MW
Danger at start: 51; Extreme · FWI index
Energy released: 6.3GW; sum of detected power

Play back 20 Aug 2017

HOTSPOTS BY DAY 10 Aug20 Aug

How it evolved, day by day

10111314151617181920

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

The weather it burned in

41°high

38km/h · peak gust

13%lowest humidity

It had gone 58 days without rain (1 mm or more) when it started.

This area had burned before

51% of the perimeter overlaps earlier fires recorded since 2016: 2,918 ha in 2016.

1,123 ha Apuí fire, August 2016 4,271 ha in total; the hectares shown are those it shares with this fire

What happened to each town

Apuí 20,647 inhabitants where it started

5,658 ha reached on 3 Aug

0.1 %

Burnt area inside each municipality, from crossing the GWIS perimeter with administrative boundaries. The distance is from the town centre 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) · Copernicus Climate Change Service (ERA5)

Day	High	Min. humidity	Peak gust	Rain	Danger (FWI)
3 Aug	40.6 °C	15 %	38 km/h	0.0 mm	Extreme 51
4 Aug	40.9 °C	13 %	32 km/h	0.0 mm	Very high 50
5 Aug	37.5 °C	19 %	28 km/h	0.0 mm	Very high 48
6 Aug	37.2 °C	28 %	27 km/h	0.0 mm	Very high 42
7 Aug	38.9 °C	24 %	28 km/h	0.0 mm	Very high 43
8 Aug	39.5 °C	29 %	36 km/h	0.2 mm	Very high 42
9 Aug	38.5 °C	31 %	32 km/h	1.9 mm	High 24
10 Aug	38.2 °C	36 %	31 km/h	0.3 mm	High 29
11 Aug	34.0 °C	40 %	27 km/h	5.2 mm	Low 7
12 Aug	33.7 °C	46 %	30 km/h	0.4 mm	Moderate 16
13 Aug	35.9 °C	39 %	30 km/h	0.0 mm	High 23
14 Aug	36.9 °C	39 %	23 km/h	0.0 mm	High 24
15 Aug	39.1 °C	31 %	21 km/h	0.0 mm	High 28
16 Aug	36.0 °C	41 %	22 km/h	0.0 mm	High 29
17 Aug	33.9 °C	46 %	34 km/h	1.3 mm	Moderate 16
18 Aug	38.3 °C	28 %	27 km/h	0.0 mm	High 30
19 Aug	37.8 °C	29 %	24 km/h	0.0 mm	High 33
20 Aug	38.8 °C	23 %	24 km/h	0.0 mm	High 34
21 Aug after	34.7 °C	31 %	37 km/h	0.0 mm	High 37
22 Aug after	36.0 °C	33 %	24 km/h	0.0 mm	High 36
23 Aug after	36.3 °C	29 %	27 km/h	0.0 mm	High 37
24 Aug after	37.3 °C	31 %	37 km/h	0.9 mm	High 30
25 Aug after	39.4 °C	21 %	29 km/h	0.0 mm	Very high 38
26 Aug after	39.4 °C	19 %	30 km/h	0.0 mm	Very high 41
27 Aug after	38.9 °C	22 %	24 km/h	0.0 mm	Very high 40
28 Aug after	40.1 °C	22 %	26 km/h	0.0 mm	Very high 41
29 Aug after	37.6 °C	25 %	32 km/h	0.0 mm	Very high 41
30 Aug after	39.1 °C	24 %	25 km/h	0.0 mm	Very high 42
31 Aug after	37.7 °C	32 %	31 km/h	0.1 mm	High 38
1 Sept after	38.5 °C	28 %	30 km/h	0.0 mm	Very high 39
2 Sept after	37.3 °C	24 %	29 km/h	0.0 mm	High 38
3 Sept after	38.1 °C	25 %	31 km/h	0.0 mm	Very high 39
4 Sept after	39.1 °C	19 %	26 km/h	0.0 mm	Very high 41
5 Sept after	39.2 °C	16 %	38 km/h	0.0 mm	Very high 50
6 Sept after	39.1 °C	21 %	32 km/h	0.0 mm	Very high 48

Before and after, from space

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

↔

Before · 3 Aug 2017

After · 27 Aug 2017

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 · 484Every 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 Apuí fire last?: GWIS (Copernicus) dates it between 10 August 2017 and 20 August 2017: 11 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 5,627 hectares (56.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Apuí (5,658 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 40.9 °C, humidity dropped to 13 % and gusts hit 38 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

INPE · Programa Queimadas ↗
IBAMA · Prevfogo ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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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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