Burned area
satellite only5,798ha
Perimeter published by GWIS (Copernicus).
- Source
- GWIS (Copernicus)
- Date
- 23 Sept 2022 – 28 Sept 2022
+− cross-check
No official record is matched to this page to compare it with.
AO · Angola · –
Nancova fire, 23 September 2022 Nancova
Out · last detection 28 Sept 2022, 12:22 UTC
The fire started on 23 September 2022 in Nancova, Angola, and satellites saw it burning for 6 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 5,798 hectares from heat detections, spread across a single municipality.
It is the 392th largest in Cuando Cubango since 2016 (of 504 with a page). Number 97 in Angola in 2022, of 143.
Use this data
Compare with…
Use this data
Fire page data · version 2026-10-24matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only6days
23 Sept 2022 to 28 Sept 2022: first and last day with fire on the page.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 28 Sept 2022, 12:22 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only23 Sept 2022
First day with fire seen by the satellites or the perimeter.
- Source
- GWIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 23 Sept 2022
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only192
VIIRS detections at 375 m. Most intense hotspot: 93 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 23 Sept 2022 – 28 Sept 2022
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only946MW
Total radiative power on 26 September 2022; hotspots that day: 94.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 26 Sept 2022
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model52.5FWI · extreme
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 60.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 23 Sept 2022, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model36.6°C · 12% RH
High of 36.6 °C and minimum humidity of 12% on 28 September 2022; gusts of 48 km/h on 28 September 2022.
- Source
- weather model at the fire’s grid cell
- Date
- 23 Sept 2022 – 28 Sept 2022
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed GHSLPopulation and built-up area computed
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
What was saved on 24 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 5,798 ha
- Dates
- 23 Sept 2022 – 28 Sept 2022
- Name
- Nancova
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/nancova-2022-09-9?v=2026-10-24A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire nancova-2022-09-9.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022-09-23 | 3 | 7 | 35.9 | 16.1 | 8 | 12.4 | 32.4 | 0 | 52.5 | extremo | 1 |
| 2022-09-24 | 14 | 330 | 36.4 | 18 | 12 | 16.5 | 37.1 | 0 | 57.9 | extremo | 1 |
| 2022-09-25 | 49 | 514 | 35.4 | 21.7 | 16 | 21.8 | 45.4 | 0 | 63.3 | extremo | 1 |
| 2022-09-26 | 94 | 946 | 34.8 | 21.4 | 14 | 14.3 | 29.5 | 0 | 53.7 | extremo | 1 |
| 2022-09-27 | 29 | 266 | 36.1 | 18.8 | 13 | 12.4 | 25.6 | 0 | 51.7 | extremo | 1 |
| 2022-09-28 | 3 | 57 | 36.6 | 21.9 | 12 | 22.7 | 47.5 | 0 | 65.5 | extremo | 1 |
| 2022-09-29 | 0 | 0 | 34.6 | 22.6 | 17 | 21.5 | 44.6 | 0 | 61.4 | extremo | 0 |
| 2022-09-30 | 0 | 0 | 34.9 | 21.5 | 17 | 15 | 26.6 | 0 | 52.9 | extremo | 0 |
| 2022-10-01 | 0 | 0 | 36.2 | 18.9 | 10 | 18.9 | 39.6 | 0 | 59.1 | extremo | 0 |
| 2022-10-02 | 0 | 0 | 35.2 | 19.3 | 14 | 22.9 | 45.4 | 0 | 64.9 | extremo | 0 |
| 2022-10-03 | 0 | 0 | 36.4 | 19.7 | 10 | 19.2 | 41 | 0 | 60 | extremo | 0 |
| 2022-10-04 | 0 | 0 | 36.5 | 17.6 | 10 | 17.1 | 36.7 | 0 | 57.5 | extremo | 0 |
| 2022-10-05 | 0 | 0 | 37.3 | 19.5 | 10 | 19.1 | 40.7 | 0 | 60.4 | extremo | 0 |
| 2022-10-06 | 0 | 0 | 36 | 20.7 | 13 | 18.1 | 38.2 | 0 | 59.4 | extremo | 0 |
| 2022-10-07 | 0 | 0 | 36.8 | 19.9 | 11 | 18.7 | 40 | 0 | 60.4 | extremo | 0 |
| 2022-10-08 | 0 | 0 | 35 | 22.3 | 12 | 27.5 | 55.4 | 0 | 73.8 | muy_extremo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: GWIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 5,798ha
- GWIS perimeter (Copernicus)
- Duration
- 6days
- 23 Sept 2022 – 28 Sept 2022
- Municipalities hit
- 1
- municipalities
- Started on
- 23 Sept
- 2022
- Heat detections
- 192
- in a single hotspot: 93 MW
- Danger at start
- 52
- Extreme · FWI index
- Average daily power
- 353MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
23 Sept28 Sept
28 Sept 2022
How it evolved, day by day
23 Sept
26 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
37°high
48km/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
74% of the perimeter overlaps earlier fires recorded since 2016: 4 ha in 2017, 4,343 ha in 2019, 27 ha in 2021.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each town
-
Nancova where it started5,823 ha reached on 23 Sept0.6 %
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 2020Built-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) |
|---|---|---|---|---|---|
| 23 Sept | 35.9 °C | 8 % | 32 km/h | 0.0 mm | Extreme 52 |
| 24 Sept | 36.4 °C | 12 % | 37 km/h | 0.0 mm | Extreme 58 |
| 25 Sept | 35.4 °C | 16 % | 45 km/h | 0.0 mm | Extreme 63 |
| 26 Sept | 34.8 °C | 14 % | 30 km/h | 0.0 mm | Extreme 54 |
| 27 Sept | 36.1 °C | 13 % | 26 km/h | 0.0 mm | Extreme 52 |
| 28 Sept | 36.6 °C | 12 % | 48 km/h | 0.0 mm | Extreme 66 |
| 29 Sept after | 34.6 °C | 17 % | 45 km/h | 0.0 mm | Extreme 61 |
| 30 Sept after | 34.9 °C | 17 % | 27 km/h | 0.0 mm | Extreme 53 |
| 1 Oct after | 36.2 °C | 10 % | 40 km/h | 0.0 mm | Extreme 59 |
| 2 Oct after | 35.2 °C | 14 % | 45 km/h | 0.0 mm | Extreme 65 |
| 3 Oct after | 36.4 °C | 10 % | 41 km/h | 0.0 mm | Extreme 60 |
| 4 Oct after | 36.5 °C | 10 % | 37 km/h | 0.0 mm | Extreme 58 |
| 5 Oct after | 37.3 °C | 10 % | 41 km/h | 0.0 mm | Extreme 60 |
| 6 Oct after | 36.0 °C | 13 % | 38 km/h | 0.0 mm | Extreme 59 |
| 7 Oct after | 36.8 °C | 11 % | 40 km/h | 0.0 mm | Extreme 60 |
| 8 Oct after | 35.0 °C | 12 % | 55 km/h | 0.0 mm | Very extreme 74 |
Its twins: fires that started in the same weather
It started with an FWI of 52.5, a minimum humidity of 8% and more than two months without rain. Fires in the area that started in weather like this since 2016: 17.
FWI at the start
52.5
Minimum humidity
8 %
Days without rain
60+
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Nancova fire, 23 September 2022
5,798 ha
6 days
FWI 52.5
Min. humidity 8 %
Menongue fire, September 2024
5,618 ha
20 days
FWI 53.4
Min. humidity 8 %
77 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
Nancova fire, September 2023
9,833 ha
19 days
FWI 53.6
Min. humidity 9 %
24 km away, in 2023
First rain (1 mm or more) after it ended: none in the following ten days.
Cuito Cuanavale fire, August 2024
9,835 ha
23 days
FWI 52.1
Min. humidity 8 %
138 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
Nancova fire, July 2019
5,828 ha
8 days
FWI 50.6
Min. humidity 9 %
45 km away, in 2019
First rain (1 mm or more) after it ended: none in the following ten days.
Cuito Cuanavale fire, September 2017
7,035 ha
11 days
FWI 51.6
Min. humidity 9 %
95 km away, in 2017
First rain (1 mm or more) after it ended: 1.1 mm on 7 Oct.
What happened to them
- 12 days
- median duration
- 6,028 ha
- median area
- 12 %
- went past 10,000 ha
- 1.1 mm
- rain at the end (median; 1 of 17 had it)
It burned an area similar to its twins (5,798 ha against a median of 6,028 ha) and lasted 6 days, against 12 days.
In 16 of 17, 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 1.1 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
48km/h · max. gust
It was considered over on 28 Sept, and not even 1 mm fell in the following ten days: it went out without rain. Twins with rain when they ended: 1 of 17, with a median of 1.1 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.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 16 Sept 2022
After · 5 Oct 2022
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 · CopernicusOn 27 September 2022 the air beside the fire reached 118 µg/m³ of PM2.5. That day averaged 71: 4.7 times the WHO daily guideline (15).
PM2.5 peak118 µg/m³
Days over the guideline9 days
PM10169 µg/m³
Optical depth1.34
WHO 15
21 Sept24 Sept27 Sept30 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 · 192Every 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
- 27,527 haNancova12 September 2021 · 17 days · 18 km away
- 22,260 haNancova15 August 2021 · 21 days · 23 km away
- 29,013 haNancova19 July 2019 · 45 days · 26 km away
- 23,999 haNancova17 August 2023 · 21 days · 27 km away
- 16,190 haNancova21 August 2021 · 26 days · 27 km away
- 15,252 haNancova23 August 2023 · 22 days · 27 km away
Frequently asked questions
- How long did the Nancova fire last?
- GWIS (Copernicus) dates it between 23 September 2022 and 28 September 2022: 6 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 5,798 hectares (58.0 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Nancova (5,823 ha, 0.6 %).
- What was the weather like?
- During the fire the temperature reached 36.6 °C, humidity dropped to 8 % and gusts hit 48 km/h. The fire danger index (FWI) reached 66, 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: 17. Their median duration was 12 days and their median area 6,028 ha; 12 % went past 10,000 ha. In 16 of 17, 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 1.1 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 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
No changes since 24 October 2026.
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.
Report an error
How we know this
- Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 192 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.
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.