El Khroub fire, July 2021 El Khroub, Ibn Badis, Constantine
The fire started on 29 July 2021 in El Khroub, Algeria, and satellites saw it burning for 3 days. Copernicus mapped a burnt perimeter of 2,637 hectares from satellite imagery, spread across 3 municipalities.
It is the 5th largest in Constantine since 2016 (of 31 with a page). Number 15 in Algeria in 2021, of 92.
Compare with…
- Burnt area
- 2,637ha
- Copernicus perimeter
- Duration
- 3days
- 29 Jul 2021 – 31 Jul 2021
- Municipalities hit
- 3
- communes
- Started on
- 29 Jul
- 2021
- Heat detections
- 13
- in a single hotspot: 142 MW
- Danger at start
- 65
- Extreme · FWI index
- Average daily power
- 134MW
- 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 40 days without rain (1 mm or more) when it started. Rain came after the fire: 1.0 mm on 2 Aug.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
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
-
El Khroub where it started1,390 ha reached on 30 Jul5.4 %
-
1,075 ha3.3 %
-
179 ha1.0 %
Burnt area inside each municipality, from crossing the official 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.
What burned
- Other natural land57 %
- Mixed forest41 %
- Agricultural areas1.1 %
- Broadleaved forest0.6 %
Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).
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) |
|---|---|---|---|---|---|
| 29 Jul | 38.5 °C | 12 % | 39 km/h | 0.0 mm | Extreme 65 |
| 30 Jul | 39.1 °C | 11 % | 49 km/h | 0.0 mm | Extreme 70 |
| 31 Jul | 39.6 °C | 9 % | 55 km/h | 0.1 mm | Very extreme 95 |
| 1 Aug after | 30.5 °C | 30 % | 51 km/h | 0.0 mm | Extreme 60 |
| 2 Aug after | 34.9 °C | 27 % | 44 km/h | 1.0 mm | High 35 |
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 31 July 2021 the air beside the fire reached 31 µg/m³ of PM2.5. That day averaged 25: 1.7 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 · 13Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 6,045 haIbn Badis ابن باديسJuly 2026 · 2 days · 7 km away
- 3,593 haIbn Badis ابن باديسAugust 2022 · 2 days · 9 km away
- 2,491 haAïn Smara عين سمارةAugust 2019 · 5 days · 20 km away
- 3,913 haAin Bouziane عين بوزيانJuly 2026 · 2 days · 25 km away
- 2,708 haAïn Smara عين سمارةJuly 2026 · 2 days · 27 km away
- 2,768 haGrarem Gouga القرارم قوقةJuly 2026 · 97 days · 34 km away
Frequently asked questions
- How long did the El Khroub fire last?
- Copernicus dates it between 29 July 2021 and 31 July 2021: 3 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 2,637 hectares (26.4 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 3 municipalities: El Khroub (1,390 ha, 5.4 %); Ibn Badis (1,075 ha, 3.3 %); Constantine (179 ha, 1.0 %).
- Did the fire reach a town?
- The fire came within 9.7 km of the centre of Constantine, the closest of the areas it touched. That is the distance from the perimeter, or the nearest hotspot, to the point marking the centre; it does not mean it entered the houses.
- What was the weather like?
- During the fire the temperature reached 39.6 °C, humidity dropped to 9 % and gusts hit 55 km/h. The fire danger index (FWI) reached 95, class Very extreme.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Algeria (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: 14 · 1021 · Emergency number and official warnings ›
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: EFFIS (Copernicus), mapped on satellite imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. 13 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.
Where this data comes from
The perimeter and land cover come from the Copernicus European Forest Fire Information System (EFFIS), measured on MODIS and Sentinel-2 imagery and published under CC BY 4.0. 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 ADM3 (Creative Commons Attribution-ShareAlike 2.0). The area per municipality is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from each country’s official figure.