Calai fire, 9 July 2024 Calai
The fire started on 9 July 2024 in Calai, Angola, and satellites saw it burning for 10 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 8,506 hectares from heat detections, spread across a single municipality.
It is the 256th largest in Cuando Cubango since 2016 (of 659 with a page). Number 42 in Angola in 2024, of 135.
Compare with…
Suggestions: Calai · 2017Calai · 2022Calai · 2020Calai · 2019
- Burnt area
- 8,506ha
- GWIS perimeter (Copernicus)
- Duration
- 10days
- 9 Jul 2024 – 18 Jul 2024
- Municipalities hit
- 1
- municipalities
- Started on
- 9 Jul
- 2024
- Heat detections
- 100
- in a single hotspot: 42 MW
- Danger at start
- 52
- Extreme · FWI index
- Average daily power
- 131MW
- detected power per day, on average
Where it burned
How it evolved, day by day
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
It had gone more than two months without rain (1 mm or more) when it started.
This area had burned before
82% of the perimeter overlaps earlier fires recorded since 2016: 843 ha in 2016, 3,630 ha in 2017, 559 ha in 2018, 900 ha in 2019, 2,975 ha in 2020, 42 ha in 2021, 2,784 ha in 2022. Part of it burned more than once, so the yearly figures add up to more than the 6,935 ha that had burned before.
- 1,046 ha Calai fire, August 2017 26,080 ha in total; the hectares shown are those it shares with this fire
- 1,046 ha Calai fire, September 2022 7,877 ha in total; the hectares shown are those it shares with this fire
- 439 ha Calai fire, September 2020 9,444 ha in total; the hectares shown are those it shares with this fire
- 171 ha Calai fire, July 2019 11,109 ha in total; the hectares shown are those it shares with this fire
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
-
Calai where it started8,559 ha reached on 7 Jul1.1 %
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 2025Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
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) |
|---|---|---|---|---|---|
| 9 Jul | 24.9 °C | 12 % | 35 km/h | 0.0 mm | Extreme 52 |
| 10 Jul | 27.6 °C | 9 % | 28 km/h | 0.0 mm | Very high 48 |
| 11 Jul | 28.3 °C | 8 % | 32 km/h | 0.0 mm | Very high 49 |
| 12 Jul | 28.6 °C | 7 % | 30 km/h | 0.0 mm | Very high 50 |
| 13 Jul | 29.8 °C | 7 % | 28 km/h | 0.0 mm | Very high 50 |
| 14 Jul | 30.0 °C | 8 % | 24 km/h | 0.0 mm | Very high 49 |
| 15 Jul | 29.6 °C | 8 % | 34 km/h | 0.0 mm | Extreme 51 |
| 16 Jul | 29.6 °C | 10 % | 31 km/h | 0.0 mm | Very high 50 |
| 17 Jul | 30.0 °C | 10 % | 31 km/h | 0.0 mm | Very high 50 |
| 18 Jul | 30.7 °C | 11 % | 32 km/h | 0.0 mm | Extreme 52 |
| 19 Jul after | 30.7 °C | 9 % | 27 km/h | 0.0 mm | Very high 50 |
| 20 Jul after | 30.8 °C | 10 % | 25 km/h | 0.0 mm | Extreme 50 |
| 21 Jul after | 31.2 °C | 10 % | 32 km/h | 0.0 mm | Extreme 51 |
| 22 Jul after | 31.6 °C | 9 % | 28 km/h | 0.0 mm | Extreme 51 |
| 23 Jul after | 31.5 °C | 9 % | 32 km/h | 0.0 mm | Extreme 54 |
| 24 Jul after | 31.6 °C | 8 % | 28 km/h | 0.0 mm | Extreme 51 |
| 25 Jul after | 31.8 °C | 8 % | 26 km/h | 0.0 mm | Extreme 51 |
| 26 Jul after | 32.5 °C | 7 % | 23 km/h | 0.0 mm | Extreme 51 |
| 27 Jul after | 31.9 °C | 7 % | 21 km/h | 0.0 mm | Extreme 51 |
| 28 Jul after | 30.8 °C | 7 % | 26 km/h | 0.0 mm | Extreme 52 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
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 14 July 2024 the air beside the fire reached 50 µg/m³ of PM2.5. That day averaged 38: 2.6 times the WHO daily guideline (15).
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 · 100Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 26,080 haCalai24 August 2017 · 17 days · 8 km away
- 21,076 haCalai4 September 2025 · 16 days · 8 km away
- 14,570 haCalai11 September 2025 · 9 days · 13 km away
- 12,542 haCalai27 September 2022 · 14 days · 34 km away
- 23,514 haCalai6 September 2020 · 11 days · 37 km away
- 17,391 haCalai12 September 2018 · 10 days · 39 km away
Frequently asked questions
- How long did the Calai fire last?
- GWIS (Copernicus) dates it between 9 July 2024 and 18 July 2024: 10 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 8,506 hectares (85.1 km²). It is an estimate: official national figures may differ.
- Which municipalities burned?
- The fire only entered Calai (8,559 ha, 1.1 %).
- What was the weather like?
- During the fire the temperature reached 30.7 °C, humidity dropped to 7 % and gusts hit 35 km/h. The fire danger index (FWI) reached 52, 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.
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.
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. 100 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 2025, 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.