How long did the Orán fire last?

According to the heat detections seen by satellite inside the perimeter, it burned from 28 September 2025 to 16 October 2025 (19 days). The perimeter dates it from 28 September 2025 to 11 October 2025.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,201 hectares (22.0 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Orán (2,207 ha, 0.2 %).

What was the weather like?

During the fire the temperature reached 40.2 °C, humidity dropped to 17 % and gusts hit 43 km/h. The fire danger index (FWI) reached 33, class High.

Where does this data come from?

From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Argentina (geoBoundaries). It is not an official report.

AR · Argentina · 2025-09-28 → 2025-10-16

Orán fire, 28 September 2025 Orán

Out · last detection 16 Oct 2025, 05:12 UTC

The fire started on 28 September 2025 in Orán, Argentina, and satellites saw it burning for 19 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 2,201 hectares from heat detections, spread across a single municipality.

It is the 106th largest in Salta since 2016 (of 231 with a page). Number 105 in Argentina in 2025, of 206.

Compare with…

Suggestions: Orán · 2022 Orán · 2025 Orán · 2025 General José de San Martín · 2022

Burnt area: 2,201ha; GWIS perimeter (Copernicus)
Duration: 19days; 28 Sept 2025 – 16 Oct 2025
Municipalities hit: 1; departments
Started on: 28 Sept; 2025
Heat detections: 164; in a single hotspot: 158 MW
Danger at start: 31; High · FWI index
Average daily power: 217MW; detected power per day, on average

HOTSPOTS BY DAY 28 Sept16 Oct

Play back 16 Oct 2025

How it evolved, day by day

30 Sept 4 Oct 7 Oct 9 Oct 10 Oct 11 Oct 14 Oct 16 Oct

Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.

The weather it burned in

40°high

43km/h · peak gust

17%lowest humidity

It had gone 5 days without rain (1 mm or more) when it started. Rain came after the fire: 1.3 mm on 17 Oct.

This area had burned before

48% of the perimeter overlaps earlier fires recorded since 2016: 134 ha in 2020, 98 ha in 2022, 1,106 ha in 2024. Part of it burned more than once, so the yearly figures add up to more than the 1,063 ha that had burned before.

How big is it?

It burned the equivalent of 1.4% of the area of London (22 km² against 1,583 km²).

London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).

This compares size, not location: both shapes are at the same scale, north up, centred on each other.

What happened to each town

Orán where it started

2,207 ha reached on 30 Sept

0.2 %

Burnt area inside each municipality, from crossing the GWIS 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.

People and buildings inside the perimeter

GHSL 2025

Built-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)
28 Sept	29.6 °C	24 %	26 km/h	0.0 mm	High 31
29 Sept	33.8 °C	26 %	20 km/h	0.0 mm	High 32
30 Sept	31.4 °C	40 %	43 km/h	9.2 mm	Low 6
1 Oct	25.5 °C	50 %	17 km/h	5.9 mm	Very low 2
2 Oct	28.6 °C	41 %	18 km/h	0.0 mm	Low 6
3 Oct	34.3 °C	33 %	26 km/h	0.0 mm	Moderate 16
4 Oct	37.6 °C	31 %	20 km/h	0.0 mm	Moderate 20
5 Oct	40.2 °C	21 %	29 km/h	0.0 mm	High 29
6 Oct	28.8 °C	34 %	26 km/h	0.4 mm	High 24
7 Oct	26.6 °C	22 %	21 km/h	0.0 mm	High 22
8 Oct	29.3 °C	17 %	24 km/h	0.0 mm	High 27
9 Oct	32.1 °C	19 %	22 km/h	0.0 mm	High 27
10 Oct	36.5 °C	17 %	27 km/h	0.0 mm	High 30
11 Oct	37.8 °C	18 %	25 km/h	0.0 mm	High 33
12 Oct	32.1 °C	23 %	43 km/h	0.0 mm	High 38
13 Oct	31.8 °C	21 %	23 km/h	0.0 mm	High 32
14 Oct	33.7 °C	25 %	30 km/h	0.0 mm	High 34
15 Oct	35.8 °C	31 %	26 km/h	0.0 mm	High 35
16 Oct	39.4 °C	23 %	37 km/h	0.0 mm	High 37
17 Oct after	34.2 °C	43 %	22 km/h	1.3 mm	Moderate 17

Before and after, from space

Drag the line to compare the same ground before the fire and after it.

↔

Before · 21 Sept 2025

After · 23 Oct 2025

Before After

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 · Copernicus

On 10 October 2025 the air beside the fire reached 54 µg/m³ of PM2.5. That day averaged 35: 2.4 times the WHO daily guideline (15).

PM2.5 peak54 µg/m³

Days over the guideline11 days

PM1055 µg/m³

Optical depth0.55

WHO 15

2223242526272829301234567891011121314

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 · 164Every 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

All fires in Argentina ›

Frequently asked questions

How long did the Orán fire last?: According to the heat detections seen by satellite inside the perimeter, it burned from 28 September 2025 to 16 October 2025 (19 days). The perimeter dates it from 28 September 2025 to 11 October 2025.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 2,201 hectares (22.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Orán (2,207 ha, 0.2 %).
What was the weather like?: During the fire the temperature reached 40.2 °C, humidity dropped to 17 % and gusts hit 43 km/h. The fire danger index (FWI) reached 33, class High.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Argentina (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: 911 · 100 · Emergency number and official warnings ›

Servicio Nacional de Manejo del Fuego ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

History of this page · 1 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.

25 October 2026 Last day with fire: 11 October 2025 → 16 October 2025.

RSS Changes to this page

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

What do you think is wrong?

Dates or duration Place or towns Burned area Name It was not a wildfire Same fire as another page Something else

What really happened?

Your connection to the fire (optional) Email (optional)

We will only use your email to reply about this report. Privacy. This is not an emergency service: if there is a fire now, call 911 · 100.

How we know this

Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
Dates adjusted with the VIIRS detections inside the perimeter, which said 28 September 2025 to 11 October 2025. 164 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.

How we build fire pages: methodology ›

Where this data comes from

The perimeter comes from the Copernicus Global Wildfire Information System (GWIS), which rebuilds it from MODIS and VIIRS heat detections and publishes it under CC BY 4.0. It is not measured on imagery as in Europe, so it is an estimate. 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 (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 from each country’s official figure.

Where it burned