Tundzha fire, August 2023 Тунджа · Tundzha
The fire started on 18 August 2023 in Tundzha, Bulgaria, and satellites saw it burning for 5 days. Copernicus mapped a burnt perimeter of 247 hectares from satellite imagery, spread across a single municipality.
It is the 12th largest in Yambol since 2016 (of 17 with a page). Number 16 in Bulgaria in 2023, of 25.
The power measured by the satellite is low (1.1 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
- 247ha
- Copernicus perimeter
- Duration
- 5days
- 18 Aug 2023 – 22 Aug 2023
- Municipalities hit
- 1
- municipalities
- Started on
- 18 Aug
- 2023
- Heat detections
- 2
- in a single hotspot: 1 MW
- Danger at start
- 37
- High · FWI index
- Average daily power
- 2MW
- detected power per day, on average
Where it burned
How it evolved, day by day
18 Aug 2023 · 2 MW · 2
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 12 days without rain (1 mm or more) when it started. Rain came after the fire: 1.2 mm on 24 Aug.
This area had burned before
2% of the perimeter overlaps earlier fires recorded since 2016: 4 ha in 2017.
What happened to each town
-
247 ha reached on 18 Aug0.2 %
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
- Scrub and transitional woodland47 %
- Agricultural areas44 %
- Broadleaved forest9.7 %
Natura 2000 protected area affected: 80 %
- LIC Sveti Iliyski vazvishenia BG0000401
Natura 2000 sites (European Environment Agency, 2024 release) crossed by the perimeter.
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) |
|---|---|---|---|---|---|
| 19 Aug | 31.9 °C | 32 % | 55 km/h | 0.0 mm | High 37 |
| 20 Aug | 34.3 °C | 27 % | 45 km/h | 0.0 mm | Very high 39 |
| 21 Aug | 36.2 °C | 17 % | 42 km/h | 0.0 mm | Very high 46 |
| 22 Aug | 35.1 °C | 29 % | 41 km/h | 0.0 mm | Very high 45 |
| 23 Aug after | 34.1 °C | 29 % | 36 km/h | 0.0 mm | Very high 39 |
| 24 Aug after | 34.7 °C | 34 % | 29 km/h | 1.2 mm | High 32 |
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 23 August 2023 the air beside the fire reached 18 µg/m³ of PM2.5. That day averaged 15: 1.0 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 · 2Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 594 haTundzha ТунджаSeptember 2017 · 1 day · 3 km away
- 720 haNova Zagora Нова ЗагораAugust 2019 · 2 days · 13 km away
- 1,531 haTopolovgrad ТополовградSeptember 2020 · 2 days · 24 km away
- 812 haGalabovo ГълъбовоJuly 2016 · 2 days · 32 km away
- 598 haTopolovgrad Тополовград31 August 2016 · 3 days · 33 km away
- 1,259 haTopolovgrad Тополовград30 August 2016 · 3 days · 37 km away
Frequently asked questions
- How long did the Tundzha fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 18 August 2023 to 22 August 2023 (5 days). The perimeter dates it from 19 August 2023 to 22 August 2023.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 247 hectares (2.5 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Tundzha (247 ha, 0.2 %).
- Did the fire reach a town?
- The fire started in Tundzha and came within 24.5 km of its centre. 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 36.2 °C, humidity dropped to 17 % and gusts hit 55 km/h. The fire danger index (FWI) reached 46, class Very high.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Bulgaria (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: 112 · 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 adjusted with the VIIRS detections inside the perimeter, which said 19 August 2023 to 22 August 2023. 2 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 ADM2 (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.