Ključ fire, 7 April 2020 Ključ, Sanski Most
The fire started on 7 April 2020 in Ključ, Bosnia & Herzegovina, and satellites saw it burning for 1 day. Copernicus mapped a burnt perimeter of 119 hectares from satellite imagery, spread across 2 municipalities.
It is the 462th largest in Federation of Bosnia and Herzegovina since 2016 (of 520 with a page). Number 162 in Bosnia & Herzegovina in 2020, of 183.
The power measured by the satellite is low (6.7 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
- Burnt area
- 119ha
- Copernicus perimeter
- Duration
- 1day
- 7 Apr 2020 – 7 Apr 2020
- Municipalities hit
- 2
- municipalities
- Started on
- 7 Apr
- 2020
- Heat detections
- 9
- in a single hotspot: 7 MW
- Danger at start
- 11
- Low · FWI index
- Energy released
- 34MW
- 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 6 days without rain (1 mm or more) when it started. Rain came after the fire: 16.5 mm on 14 Apr.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
Ključ where it started103 ha reached on 7 Apr0.3 %
-
16 ha reached on 7 Apr0.0 %
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
- Broadleaved forest63 %
- Agricultural areas34 %
- Scrub and transitional woodland3.4 %
Land cover inside the perimeter according to Corine Land Cover, as reported by Copernicus.
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) |
|---|---|---|---|---|---|
| 7 Apr | 17.9 °C | 16 % | 42 km/h | 0.0 mm | Low 11 |
| 8 Apr after | 18.0 °C | 19 % | 41 km/h | 0.0 mm | Moderate 12 |
| 9 Apr after | 20.7 °C | 23 % | 26 km/h | 0.0 mm | Low 11 |
| 10 Apr after | 21.5 °C | 26 % | 31 km/h | 0.0 mm | Moderate 12 |
| 11 Apr after | 21.4 °C | 27 % | 28 km/h | 0.0 mm | Moderate 12 |
| 12 Apr after | 23.0 °C | 25 % | 18 km/h | 0.0 mm | Moderate 13 |
| 13 Apr after | 21.5 °C | 27 % | 49 km/h | 0.0 mm | Moderate 18 |
| 14 Apr after | 11.9 °C | 63 % | 37 km/h | 16.5 mm | Very low 0 |
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 · 9Every 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 Ključ fire last?
- Copernicus dates it between 7 April 2020 and 7 April 2020: 1 day between the first and last image with fire.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 119 hectares (1.2 km²). Official national figures may differ.
- Which municipalities burned?
- The fire entered 2 municipalities: Ključ (103 ha, 0.3 %); Sanski Most (16 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 17.9 °C, humidity dropped to 16 % and gusts hit 42 km/h. The fire danger index (FWI) reached 11, class Low.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Bosnia & Herzegovina (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: 123 · 112
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 (Public Domain). 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.