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AO · Angola · –

Rivungo fire, 6 September 2022 Rivungo, Dirico

Out · last detection 24 Sept 2022, 11:57 UTC

The fire started on 6 September 2022 in Rivungo, Angola, and satellites saw it burning for 18 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 19,754 hectares from heat detections, spread across 2 municipalities.

It is the 26th largest in Cuando Cubango since 2016 (of 504 with a page). Number 4 in Angola in 2022, of 143.

Compare with…
Burnt area
19,754ha
GWIS perimeter (Copernicus)
Duration
18days
6 Sept 2022 – 23 Sept 2022
Municipalities hit
2
municipalities
Started on
6 Sept
2022
Heat detections
737
in a single hotspot: 109 MW
Danger at start
53
Extreme · FWI index
Average daily power
580MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 6 Sept23 Sept
24 Sept 2022

How it evolved, day by day

6 Sept 2022 · 755 MW · 49 7 Sept 2022 · 1,125 MW · 55 8 Sept 2022 · 288 MW · 22 9 Sept 2022 · 103 MW · 8 10 Sept 2022 · 579 MW · 47 11 Sept 2022 · 171 MW · 35 12 Sept 2022 · 595 MW · 32 13 Sept 2022 · 830 MW · 75 14 Sept 2022 · 202 MW · 32 15 Sept 2022 · 1,947 MW · 103 16 Sept 2022 · 639 MW · 104 17 Sept 2022 · 1,029 MW · 91 18 Sept 2022 · 1,274 MW · 63 19 Sept 2022 · 228 MW · 15 20 Sept 2022 · 10 MW · 3 23 Sept 2022 · 6 MW · 1 24 Sept 2022 · 81 MW · 2
6 Sept 10 Sept 15 Sept 18 Sept 24 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

36°high
45km/h · peak gust
8%lowest humidity

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

This area had burned before

88% of the perimeter overlaps earlier fires recorded since 2016: 4,515 ha in 2016, 5,520 ha in 2017, 8,053 ha in 2018, 8,109 ha in 2019, 4,986 ha in 2020, 4,350 ha in 2021. Part of it burned more than once, so the yearly figures add up to more than the 17,322 ha that had burned before.

How big is it?

10 km
It burned the equivalent of 12% of the area of London (198 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. Rivungo where it started
    12,806 ha reached on 6 Sept
    0.4 %
  2. 7,089 ha reached on 7 Sept
    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)

Started with Very dry air: 40 % of the area in Angola 60 days without rain: 84 % of the area in Angola

Day High Min. humidity Peak gust Rain Danger (FWI)
6 Sept 35.4 °C 11 % 38 km/h 0.0 mm Extreme 53
7 Sept 34.2 °C 14 % 43 km/h 0.0 mm Extreme 56
8 Sept 32.8 °C 15 % 37 km/h 0.0 mm Extreme 53
9 Sept 32.7 °C 17 % 40 km/h 0.0 mm Extreme 53
10 Sept 32.9 °C 11 % 41 km/h 0.0 mm Extreme 52
11 Sept 33.6 °C 13 % 29 km/h 0.0 mm Very high 48
12 Sept 34.5 °C 10 % 28 km/h 0.0 mm Very high 47
13 Sept 34.3 °C 12 % 37 km/h 0.0 mm Extreme 52
14 Sept 33.1 °C 17 % 45 km/h 0.0 mm Extreme 57
15 Sept 31.1 °C 16 % 38 km/h 0.0 mm Extreme 53
16 Sept 31.0 °C 15 % 38 km/h 0.0 mm Extreme 52
17 Sept 32.2 °C 15 % 30 km/h 0.0 mm Very high 47
18 Sept 33.9 °C 15 % 25 km/h 0.0 mm Very high 45
19 Sept 34.5 °C 20 % 34 km/h 0.0 mm Very high 49
20 Sept 30.7 °C 14 % 42 km/h 0.0 mm Extreme 56
21 Sept 32.0 °C 11 % 37 km/h 0.0 mm Extreme 51
22 Sept 33.7 °C 8 % 32 km/h 0.0 mm Extreme 52
23 Sept 35.6 °C 10 % 29 km/h 0.0 mm Extreme 50
24 Sept after 35.8 °C 15 % 36 km/h 0.0 mm Extreme 57
25 Sept after 35.4 °C 14 % 48 km/h 0.0 mm Extreme 64
26 Sept after 35.1 °C 18 % 37 km/h 0.0 mm Extreme 53
27 Sept after 35.6 °C 15 % 34 km/h 0.0 mm Extreme 55
28 Sept after 36.2 °C 14 % 51 km/h 0.0 mm Extreme 63
29 Sept after 34.6 °C 14 % 41 km/h 0.0 mm Extreme 56
30 Sept after 34.5 °C 15 % 38 km/h 0.0 mm Extreme 54
1 Oct after 35.5 °C 11 % 35 km/h 0.0 mm Extreme 54
2 Oct after 36.1 °C 11 % 46 km/h 0.0 mm Extreme 61
3 Oct after 36.4 °C 8 % 35 km/h 0.0 mm Extreme 57

Its twins: fires that started in the same weather

It started with an FWI of 52.9, a minimum humidity of 11% and more than two months without rain. Fires in the area that started in weather like this since 2016: 61.

FWI at the start 52.9
Minimum humidity 11 %
Days without rain 60+
this fire chosen twins rest of the area
Almost identicalSimilar

Outlines of the closest twins

Dirico fire, September 2016
17,026 ha 14 days FWI 52.9 Min. humidity 11 % 90 km away, in 2016

First rain (1 mm or more) after it ended: none in the following ten days.

What happened to them

8 days
median duration
6,027 ha
median area
20 %
went past 10,000 ha
2.0 mm
rain at the end (median; 9 of 61 had it)

It was 3.3 times larger than the median of its twins and lasted 18 days, against 8 days.

Only 1 of its 61 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 52 of 61, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.0 mm.

This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it

How it ended

—first rain
—no rain in ten days
45km/h · max. gust

It was considered over on 23 Sept, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 9 of 61, with a median of 2.0 mm.

Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)

How a twin is chosen

  • Same area: fires that have already ended, less than 250 km from this one, since 2016.
  • Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
  • Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
  • Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
  • They are sorted by similarity, and the outlines of the first five are drawn.

How we calculate it

Before and after, from space

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

Before · 30 Aug 2022
After · 30 Sept 2022

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 19 September 2022 the air beside the fire reached 206 µg/m³ of PM2.5. That day averaged 109: 7.2 times the WHO daily guideline (15).

PM2.5 peak206 µg/m³
Days over the guideline20 days
PM10295 µg/m³
Optical depth1.83
4 Sept9 Sept14 Sept19 Sept24 Sept
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 · 737Every 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 Angola

Frequently asked questions

How long did the Rivungo fire last?
According to the heat detections seen by satellite inside the perimeter, it burned from 6 September 2022 to 23 September 2022 (18 days). The perimeter dates it from 6 September 2022 to 20 September 2022.
How much area did it burn?
The perimeter GWIS (Copernicus) rebuilt from heat detections is 19,754 hectares (197.5 km²). It is an estimate: official national figures may differ.
Which municipalities burned?
The fire entered 2 municipalities: Rivungo (12,806 ha, 0.4 %); Dirico (7,089 ha, 0.4 %).
What was the weather like?
During the fire the temperature reached 35.6 °C, humidity dropped to 8 % and gusts hit 45 km/h. The fire danger index (FWI) reached 57, class Extreme.
Where does this data come from?
From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Angola (geoBoundaries). It is not an official report.
How did the fires that started in similar weather in this area end?
Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 61. Their median duration was 8 days and their median area 6,027 ha; 20 % went past 10,000 ha. Only 1 of its 61 twins burned more. The weather on the first day does not explain everything: the wind in the following days, the fuel and the firefighting also count. In 52 of 61, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 2.0 mm.

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.

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. Last day with fire: 20 September 2022 → 23 September 2022.

RSS Changes to this page With cross-checks and a citable version

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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How we know this
  • Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery; 2 polygons grouped in this page.
  • Dates adjusted with the VIIRS detections inside the perimeter, which said 6 September 2022 to 20 September 2022. 737 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 (Public Domain). 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.