How long did the Lumaco fire last?

GWIS (Copernicus) dates it between 4 April 2026 and 7 April 2026: 4 days between the first and last heat detection of the perimeter.

How much area did it burn?

The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,103 hectares (11.0 km²). It is an estimate: official national figures may differ.

Which municipalities burned?

The fire only entered Lumaco (1,107 ha, 1.0 %).

What was the weather like?

During the fire the temperature reached 16.2 °C, humidity dropped to 59 % and gusts hit 44 km/h. The fire danger index (FWI) reached 2, class Very low.

Where does this data come from?

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

CL · Chile · 2026-04-04 → 2026-04-07

Lumaco fire, April 2026 Lumaco

Out · last detection 7 Apr 2026, 06:17 UTC

The fire started on 4 April 2026 in Lumaco, Chile, and satellites saw it burning for 4 days. Copernicus’s global GWIS system rebuilt a burnt perimeter of 1,103 hectares from heat detections, spread across a single municipality.

It is the 138th largest in Región de La Araucanía since 2016 (of 159 with a page). Number 47 in Chile in 2026, of 63.

Compare with…

Suggestions: Lumaco · 2023 Galvarino · 2025 Lumaco · 2023 Contulmo · 2023

Burnt area: 1,103ha; GWIS perimeter (Copernicus)
Duration: 4days; 4 Apr 2026 – 7 Apr 2026
Municipalities hit: 1; communes
Started on: 4 Apr; 2026
Heat detections: 58; in a single hotspot: 34 MW
Danger at start: 2; Very low · FWI index
Average daily power: 165MW; detected power per day, on average

Play back 7 Apr 2026

HOTSPOTS BY DAY 4 Apr7 Apr

How it evolved, day by day

4 Apr 5 Apr 6 Apr 7 Apr

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

The weather it burned in

16°high

44km/h · peak gust

59%lowest humidity

It had gone 3 days without rain (1 mm or more) when it started. Rain came after the fire: 17.0 mm on 14 Apr.

This area had burned before

No earlier perimeters overlap this fire since 2016, when the satellite record begins.

How big is it?

It burned the equivalent of 0.7% of the area of London (11 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

Lumaco where it started

1,107 ha reached on 4 Apr

1.0 %

Burnt area inside each municipality, from crossing the GWIS 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.

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 Apr	16.2 °C	59 %	25 km/h	0.0 mm	Very low 2
5 Apr	14.1 °C	76 %	22 km/h	1.0 mm	Very low 1
6 Apr	15.0 °C	68 %	37 km/h	0.0 mm	Very low 1
7 Apr	13.0 °C	70 %	44 km/h	0.0 mm	Very low 2
8 Apr after	13.9 °C	70 %	32 km/h	0.0 mm	Very low 2
9 Apr after	14.4 °C	67 %	33 km/h	0.0 mm	Very low 2
10 Apr after	13.3 °C	70 %	22 km/h	0.0 mm	Very low 2
11 Apr after	12.2 °C	75 %	38 km/h	0.0 mm	Very low 3
12 Apr after	11.7 °C	66 %	36 km/h	0.7 mm	Very low 2
13 Apr after	12.4 °C	60 %	23 km/h	0.0 mm	Very low 2
14 Apr after	11.4 °C	86 %	48 km/h	17.0 mm	Very low 0

Before and after, from space

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

↔

Before · 28 Mar 2026

After · 14 Apr 2026

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 April 2026 the air beside the fire reached 36 µg/m³ of PM2.5. That day averaged 23: 1.5 times the WHO daily guideline (15).

PM2.5 peak36 µg/m³

Days over the guideline2 days

PM1038 µg/m³

Optical depth0.22

WHO 15

2345678910

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 · 58Every 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 Chile ›

Frequently asked questions

How long did the Lumaco fire last?: GWIS (Copernicus) dates it between 4 April 2026 and 7 April 2026: 4 days between the first and last heat detection of the perimeter.
How much area did it burn?: The perimeter GWIS (Copernicus) rebuilt from heat detections is 1,103 hectares (11.0 km²). It is an estimate: official national figures may differ.
Which municipalities burned?: The fire only entered Lumaco (1,107 ha, 1.0 %).
What was the weather like?: During the fire the temperature reached 16.2 °C, humidity dropped to 59 % and gusts hit 44 km/h. The fire danger index (FWI) reached 2, class Very low.
Where does this data come from?: From the GWIS (Copernicus) burnt perimeter, NASA FIRMS VIIRS hotspots and the administrative boundaries of Chile (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: 130 (CONAF) · 132

CONAF · Corporación Nacional Forestal ↗
SENAPRED ↗

Satellite cross-check

NASA FIRMS ↗
GWIS · Copernicus ↗

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 130 (CONAF) · 132.

How we know this

Perimeter: GWIS (Copernicus), rebuilt from heat detections rather than mapped on imagery.
Dates from the perimeter: the VIIRS detections inside it did not change them. 58 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.

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 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 from each country’s official figure.

Where it burned