Cheraia fire, August 2017 الشرايع · Cheraia
The fire started on 23 August 2017 in Cheraia, Algeria, and satellites saw it burning for 2 days. Copernicus mapped a burnt perimeter of 174 hectares from satellite imagery, spread across a single municipality.
It is the 67th largest in Skikda since 2016 (of 102 with a page). Number 114 in Algeria in 2017, of 173.
- Burnt area
- 174ha
- Copernicus perimeter
- Duration
- 2days
- 23 Aug 2017 – 24 Aug 2017
- Municipalities hit
- 1
- communes
- Started on
- 23 Aug
- 2017
- Heat detections
- 16
- in a single hotspot: 134 MW
- Danger at start
- 21
- Moderate · FWI index
- Energy released
- 391MW
- sum of detected power
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 10 days 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.
What happened to each town
-
174 ha reached on 23 Aug2.6 %
Burnt area inside each municipality, from crossing the official perimeter with administrative boundaries. The distance is from the town centre to the nearest fire: staying a kilometre away does not mean it reached the houses.
What burned
- Mixed forest57 %
- Other natural land42 %
- Coniferous forest1.2 %
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) |
|---|---|---|---|---|---|
| 23 Aug | 28.4 °C | 60 % | 33 km/h | 0.0 mm | Moderate 21 |
| 24 Aug | 30.7 °C | 50 % | 35 km/h | 0.0 mm | High 24 |
| 25 Aug after | 32.9 °C | 41 % | 25 km/h | 0.0 mm | High 23 |
| 26 Aug after | 32.3 °C | 48 % | 25 km/h | 0.0 mm | High 24 |
| 27 Aug after | 33.8 °C | 38 % | 25 km/h | 0.0 mm | High 26 |
| 28 Aug after | 33.6 °C | 38 % | 30 km/h | 0.0 mm | High 28 |
| 29 Aug after | 31.4 °C | 47 % | 29 km/h | 0.0 mm | High 27 |
| 30 Aug after | 29.6 °C | 61 % | 26 km/h | 0.0 mm | Moderate 20 |
| 31 Aug after | 29.1 °C | 69 % | 30 km/h | 0.0 mm | Moderate 18 |
| 1 Sept after | 29.5 °C | 67 % | 34 km/h | 0.0 mm | Moderate 20 |
| 2 Sept after | 26.8 °C | 56 % | 35 km/h | 0.0 mm | Moderate 20 |
| 3 Sept after | 26.2 °C | 54 % | 34 km/h | 0.2 mm | Moderate 20 |
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 28 August 2017 the air beside the fire reached 32 µg/m³ of PM2.5. That day averaged 20: 1.4 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 · 16Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 1,326 haKanoua قنواعAugust 2022 · 5 days · 11 km away
- 2,709 haKerkera الكركرةJuly 2023 · 6 days · 20 km away
- 3,545 haAin KechraJuly 2026 · 4 days · 30 km away
- 1,366 haAin KechraJuly 2017 · 6 days · 35 km away
- 1,877 haOum Toub أم الطوبJuly 2026 · 1 day · 37 km away
- 3,814 haOum Toub أم الطوبAugust 2026 · 3 days · 39 km away
Frequently asked questions
- How long did the Cheraia fire last?
- Copernicus dates it between 23 August 2017 and 24 August 2017: 2 days between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 174 hectares (1.7 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Cheraia (174 ha, 2.6 %).
- Did the fire reach a town?
- The closest fire to a town centre came within 4.0 km of Cheraia. That is the distance to the perimeter or nearest hotspot; it does not mean it entered the houses.
- What was the weather like?
- During the fire the temperature reached 30.7 °C, humidity dropped to 50 % and gusts hit 35 km/h. The fire danger index (FWI) reached 24, class High.
- 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
Satellite cross-check
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
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.