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Rio Sono fire, 29 August 2016 Novo Acordo, Rio Sono

Out · last detection 8 Sept 2016, 16:43 UTC

The fire started on 29 August 2016 in Rio Sono, Brazil, and satellites saw it burning for 11 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 3,627 hectares from heat detections, spread across 2 municipalities.

It is the 937th largest in Tocantins since 2016 (of 1241 with a page). Number 475 in Brazil in 2016, of 649.

Compare with…

Suggestions: Lagoa do Tocantins · 2017Rio Sono · 2020

Burnt area
3,627ha
GWIS perimeter (Copernicus)
Duration
11days
29 Aug 2016 – 8 Sept 2016
Municipalities hit
2
municipalities
Started on
29 Aug
2016
Heat detections
117
in a single hotspot: 51 MW
Danger at start
45
Very high · FWI index
Average daily power
129MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 29 Aug8 Sept
8 Sept 2016

How it evolved, day by day

30 Aug 2016 · 15 MW · 1 31 Aug 2016 · 48 MW · 3 1 Sept 2016 · 22 MW · 2 2 Sept 2016 · 547 MW · 36 3 Sept 2016 · 209 MW · 40 4 Sept 2016 · 92 MW · 19 5 Sept 2016 · 77 MW · 15 8 Sept 2016 · 21 MW · 1
30 Aug 1 Sept 2 Sept 3 Sept 5 Sept

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

The weather it burned in

39°high
48km/h · peak gust
22%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

How big is it?

10 km
It burned the equivalent of 2.3% of the area of London (36 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. Novo Acordo 3,969 inhabitants
    2,179 ha reached on 2 Sept
    0.8 %
  2. Rio Sono 4,841 inhabitants where it started
    1,471 ha reached on 30 Aug
    0.2 %

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 2015
Built-up area3.3 ha
Residents≈ 300

Inside the perimeter there were about 3.3 hectares of built-up land and about 300 residents (GHSL 2015, 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 Aug 37.8 °C 23 % 39 km/h 0.0 mm Very high 45
31 Aug 38.3 °C 23 % 44 km/h 0.0 mm Very high 50
1 Sept 38.6 °C 24 % 34 km/h 0.0 mm Very high 45
2 Sept 38.3 °C 22 % 41 km/h 0.0 mm Very high 49
3 Sept 36.1 °C 24 % 48 km/h 0.0 mm Extreme 53
4 Sept 36.3 °C 23 % 41 km/h 0.0 mm Very high 49
5 Sept 37.4 °C 22 % 43 km/h 0.0 mm Extreme 50
6 Sept 37.7 °C 23 % 41 km/h 0.0 mm Very high 50
7 Sept 38.4 °C 23 % 36 km/h 0.0 mm Very high 46
8 Sept 38.2 °C 23 % 32 km/h 0.0 mm Very high 42
9 Sept after 36.7 °C 26 % 36 km/h 0.0 mm Very high 45
10 Sept after 37.7 °C 19 % 37 km/h 0.0 mm Very high 48
11 Sept after 37.8 °C 18 % 46 km/h 0.0 mm Extreme 55
12 Sept after 37.7 °C 25 % 39 km/h 0.0 mm Extreme 51
13 Sept after 38.1 °C 26 % 30 km/h 0.0 mm Very high 45
14 Sept after 38.4 °C 22 % 40 km/h 0.0 mm Very high 49
15 Sept after 39.2 °C 21 % 40 km/h 0.0 mm Extreme 52
16 Sept after 37.8 °C 29 % 25 km/h 0.0 mm Very high 41
17 Sept after 37.1 °C 34 % 34 km/h 0.0 mm Very high 41
18 Sept after 36.7 °C 28 % 32 km/h 0.0 mm Very high 38

Before and after, from space

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

Before · 22 Aug 2016
After · 15 Sept 2016

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 · 117Every 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 Rio Sono fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 29 August 2016 to 8 September 2016 (11 days). The perimeter dates it from 31 August 2016 to 5 September 2016.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 3,627 hectares (36.3 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Novo Acordo (2,179 ha, 0.8 %); Rio Sono (1,471 ha, 0.2 %).
What was the weather like?
During the fire the temperature reached 38.6 °C, humidity dropped to 22 % and gusts hit 48 km/h. The fire danger index (FWI) reached 53, 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 · 2 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
  1. Last day with fire: 5 September 2016 → 8 September 2016.
  2. Start date: 31 August 2016 → 29 August 2016.

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 31 August 2016 to 5 September 2016. 117 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 2015, 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.