Khanaser fire, 4 May 2021 Khanaser
The fire started on 4 May 2021 in Khanaser, Syria, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 930 hectares from satellite imagery, spread across a single municipality.
It is the 12th largest in Aleppo since 2016 (of 59 with a page). Number 5 in Syria in 2021, of 23.
The power measured by the satellite is low (3.5 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Compare with…
- Burnt area
- 930ha
- Copernicus perimeter
- Duration
- 1day
- 4 May 2021 – 4 May 2021
- Municipalities hit
- 1
- subdistricts
- Started on
- 4 May
- 2021
- Heat detections
- 1
- in a single hotspot: 3 MW
- Danger at start
- 76
- Very extreme · FWI index
- Average daily power
- 3MW
- detected power per day, on average
Where it burned
How it evolved, day by day
4 May 2021 · 3 MW · 1
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 21 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.
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
-
Khanaser where it started930 ha reached on 4 May0.6 %
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
- Agricultural areas98 %
- Other natural land1.7 %
Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).
People and buildings inside the perimeter
GHSL 2020Inside the perimeter there were about 0.22 hectares of built-up land and about 40 residents (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)
| Day | High | Min. humidity | Peak gust | Rain | Danger (FWI) |
|---|---|---|---|---|---|
| 4 May | 37.1 °C | 16 % | 46 km/h | 0.0 mm | Very extreme 76 |
| 5 May after | 34.0 °C | 18 % | 45 km/h | 0.0 mm | Extreme 69 |
| 6 May after | 32.9 °C | 21 % | 51 km/h | 0.0 mm | Extreme 68 |
| 7 May after | 31.7 °C | 20 % | 45 km/h | 0.0 mm | Extreme 61 |
| 8 May after | 33.9 °C | 16 % | 32 km/h | 0.0 mm | Very high 49 |
| 9 May after | 36.3 °C | 10 % | 58 km/h | 0.1 mm | Very extreme 75 |
| 10 May after | 31.6 °C | 9 % | 38 km/h | 0.0 mm | Extreme 57 |
| 11 May after | 32.8 °C | 12 % | 30 km/h | 0.0 mm | Extreme 56 |
| 12 May after | 33.5 °C | 10 % | 29 km/h | 0.0 mm | Extreme 56 |
| 13 May after | 34.6 °C | 14 % | 36 km/h | 0.0 mm | Extreme 63 |
| 14 May after | 35.1 °C | 15 % | 41 km/h | 0.0 mm | Extreme 68 |
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.
Detections table · 1Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Khanaser fire last?
- Copernicus dates it between 4 May 2021 and 4 May 2021: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 930 hectares (9.3 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Khanaser (930 ha, 0.6 %).
- What was the weather like?
- During the fire the temperature reached 37.1 °C, humidity dropped to 16 % and gusts hit 46 km/h. The fire danger index (FWI) reached 76, class Very extreme.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Syria (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: EFFIS (Copernicus), mapped on satellite imagery.
- Dates from the perimeter: the VIIRS detections inside it did not change them. One Suomi-NPP VIIRS detection 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 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 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)). 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.