Burned area
satellite only138ha
Perimeter published by EFFIS (Copernicus).
- Source
- EFFIS (Copernicus)
- Date
- perimeter revised on 1 August 2025
+− cross-check
No official record is matched to this page to compare it with.
UA · Ukraine · –
Popasna fire, 30 July 2025 Попаснянський район · Popasna
Out · last detection 31 Jul 2025, 10:16 UTC
The fire started on 30 July 2025 in Popasna, Ukraine, and satellites saw it burning for 4 days. Copernicus mapped a burnt perimeter of 138 hectares from satellite imagery, spread across a single municipality.
It is the 653th largest in Luhansk Oblast since 2016 (of 909 with a page). Number 966 in Ukraine in 2025, of 1358.
The power measured by the satellite is low (7.8 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.
Use this data
Compare with…
Use this data
Fire page data · version 2026-10-24matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only4days
30 Jul 2025 to 2 Aug 2025: first and last day with fire on the page.
- Source
- EFFIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- last detection: 31 Jul 2025, 10:16 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only30 Jul 2025
First day with fire seen by the satellites or the perimeter.
- Source
- EFFIS (Copernicus) · NASA FIRMS · VIIRS
- Date
- 30 Jul 2025
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only7
VIIRS detections at 375 m. Most intense hotspot: 8 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 30 Jul 2025 – 2 Aug 2025
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only16MW
Total radiative power on 31 July 2025; hotspots that day: 4.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 31 Jul 2025
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model71.7FWI · very extreme
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 6.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 30 Jul 2025, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model36.2°C · 16% RH
High of 36.2 °C and minimum humidity of 16% on 30 July 2025; gusts of 47 km/h on 30 July 2025.
- Source
- weather model at the fire’s grid cell
- Date
- 30 Jul 2025 – 2 Aug 2025
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
· reconstructed GHSLPopulation and built-up area computed
-
· reconstructed perimeterEFFIS (Copernicus) revises the perimeter
What was saved on 24 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 138 ha
- Dates
- 30 Jul 2025 – 2 Aug 2025
- Name
- Popasna
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/popasna-2025-07-19?v=2026-10-24A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire popasna-2025-07-19.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025-07-30 | 3 | 6 | 36.2 | 20 | 16 | 22.4 | 46.8 | 0 | 71.7 | muy_extremo | 1 |
| 2025-07-31 | 4 | 16 | 29.9 | 20.3 | 36 | 22.2 | 42.5 | 0 | 50.9 | extremo | 1 |
| 2025-08-01 | 0 | 0 | 27 | 16.7 | 44 | 15.9 | 33.5 | 0 | 35 | alto | 1 |
| 2025-08-02 | 0 | 0 | 30.1 | 15.2 | 28 | 16.1 | 32.4 | 0 | 35.1 | alto | 1 |
| 2025-08-03 | 0 | 0 | 25.3 | 20.1 | 55 | 19.9 | 36.4 | 6.8 | 25.6 | alto | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: EFFIS (Copernicus), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 138ha
- Copernicus perimeter
- Duration
- 4days
- 30 Jul 2025 – 2 Aug 2025
- Municipalities hit
- 1
- districts
- Started on
- 30 Jul
- 2025
- Heat detections
- 7
- in a single hotspot: 8 MW
- Danger at start
- 72
- Very extreme · FWI index
- Average daily power
- 11MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
30 Jul2 Aug
31 Jul 2025
How it evolved, day by day
30 Jul
31 Jul
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
36°high
47km/h · peak gust
16%lowest humidity
It had gone 6 days without rain (1 mm or more) when it started. Rain came after the fire: 6.8 mm on 3 Aug.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
What happened to each town
-
138 ha reached on 30 Jul0.1 %
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 areas85 %
- Mixed forest12 %
- Other natural land2.9 %
Land cover inside the perimeter as reported by Copernicus EFFIS (outside the Corine Land Cover area).
People and buildings inside the perimeter
GHSL 2025Built-up area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
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) |
|---|---|---|---|---|---|
| 30 Jul | 36.2 °C | 16 % | 47 km/h | 0.0 mm | Very extreme 72 |
| 31 Jul | 29.9 °C | 36 % | 42 km/h | 0.0 mm | Extreme 51 |
| 1 Aug | 27.0 °C | 44 % | 34 km/h | 0.0 mm | High 35 |
| 2 Aug | 30.1 °C | 28 % | 32 km/h | 0.0 mm | High 35 |
| 3 Aug after | 25.3 °C | 55 % | 36 km/h | 6.8 mm | High 26 |
Its twins: fires that started in the same weather
It started with an FWI of 71.7, a minimum humidity of 16% and 6 days without rain. Fires in the area that started in weather like this since 2020: 30.
FWI at the start
71.7
Minimum humidity
16 %
Days without rain
6
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Popasna fire, 30 July 2025
138 ha
4 days
FWI 71.7
Min. humidity 16 %
Borova fire, August 2024
110 ha
5 days
FWI 71.4
Min. humidity 16 %
93 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
Popasna fire, May 2024
713 ha
3 days
FWI 70.5
Min. humidity 17 %
34 km away, in 2024
First rain (1 mm or more) after it ended: 3.6 mm on 31 May.
Lutuhyne fire, September 2024
116 ha
2 days
FWI 71.8
Min. humidity 18 %
72 km away, in 2024
First rain (1 mm or more) after it ended: none in the following ten days.
Novoaidar fire, May 2025
565 ha
6 days
FWI 72.8
Min. humidity 19 %
25 km away, in 2025
First rain (1 mm or more) after it ended: 2.4 mm on 4 Jun.
Marinka fire, July 2025
140 ha
4 days
FWI 71.5
Min. humidity 13 %
117 km away, in 2025
First rain (1 mm or more) after it ended: 1.5 mm on 13 Jul.
What happened to them
- 3 days
- median duration
- 173 ha
- median area
- 3 %
- went past 1,000 ha
- 1.6 mm
- rain at the end (median; 20 of 30 had it)
It burned an area similar to its twins (138 ha against a median of 173 ha) and lasted 4 days, against 3 days.
In 10 of 30, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 1.6 mm.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
6.8 mmfirst rain
3 Augthe day after it ended
47km/h · max. gust
It was considered over on 2 Aug, and on 3 Aug 6.8 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 20 of 30, with a median of 1.6 mm.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2020.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 23 Jul 2025
After · 9 Aug 2025
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 1 August 2025 the air beside the fire reached 20 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).
PM2.5 peak20 µg/m³
Days over the guideline0 days
PM1026 µg/m³
Optical depth0.74
WHO 15
29 Jul31 Jul2 Aug
Good
Fair
Moderate
Poor
Very poor
Extremely poor
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 · 7Every satellite heat detection, one by one, with time, satellite, power and coordinates.
⬇ Download CSV
Times in UTC. Each detection is a 375 m pixel: a large fire yields hundreds per pass.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
- 6,751 haPopasna Попаснянський район15 September 2024 · 5 days · 20 km away
- 4,817 haPerevalsk Перевальський район4 July 2025 · 8 days · 27 km away
- 12,789 haNovoaidar Новоайдарський районSeptember 2020 · 5 days · 28 km away
- 7,135 haNovoaidar Новоайдарський район6 July 2020 · 5 days · 31 km away
- 3,400 haNovoaidar Новоайдарський район26 March 2024 · 10 days · 32 km away
- 3,888 haSlovianoserbsk Слов'яносербський районMay 2024 · 12 days · 34 km away
Frequently asked questions
- How long did the Popasna fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 30 July 2025 to 2 August 2025 (4 days). The perimeter dates it from 31 July 2025 to 31 July 2025.
- How much area did it burn?
- The perimeter Copernicus measured from satellite imagery is 138 hectares (1.4 km²). Official national figures may differ.
- Which municipalities burned?
- The fire only entered Popasna (138 ha, 0.1 %).
- Did the fire reach a town?
- The fire started in Popasna and came within 4.7 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 16 % and gusts hit 47 km/h. The fire danger index (FWI) reached 72, class Very extreme.
- Where does this data come from?
- From the EFFIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Ukraine (geoBoundaries). It is not an official report.
- How did the fires that started in similar weather in this area end?
- Fires less than 250 km away that started since 2020 with a similar FWI, humidity and dry spell: 30. Their median duration was 3 days and their median area 173 ha; 3 % went past 1,000 ha. In 10 of 30, not even 1 mm fell in the ten days after the end: they went out without rain. In the rest, the first rainy day brought a median of 1.6 mm.
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: 101 · 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.
RSS Changes to this page With cross-checks and a citable version
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 31 July 2025 to 31 July 2025. 7 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.
- Built-up area and population come from the JRC Global Human Settlement Layer (epoch 2025, 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 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.