How long did the Harney fire last?

According to the heat detections seen by satellite, it burned from 14 October 2026 to 21 October 2026 (8 days between the first and the last detection). There is no perimeter yet to date it.

How much area did it burn?

There is no official perimeter yet: NIFC has not published it. Heat detections rebuild about 1,008 hectares with fire (10.1 km²).

Which counties burned?

The fire only entered Harney (1,008 ha, 0.0 %).

Is the Harney fire still active?

No fire detections since 21 Oct 2026, 21:14 UTC. A lack of detections is not an official extinction.

What was the weather like?

During the fire the temperature reached 19.1 °C, humidity dropped to 20 % and gusts hit 39 km/h. The fire danger index (FWI) reached 29, class High.

Where does this data come from?

From the official burnt perimeter of United States agencies (MTBS / NIFC, public domain), NASA FIRMS VIIRS hotspots and the administrative boundaries of United States. It is not an official report.

US · United States · 2026-10-14 → 2026-10-21

Harney fire, 14 October 2026 Harney

Out · last detection 21 Oct 2026, 21:14 UTC

Satellites first detected fire on 14 October 2026 in Harney, United States. It has been active for 8 days, with 125 heat detections and an area with fire of about 1,008 hectares rebuilt from them, spread across a single county.

NIFC has not yet published the perimeter of this fire. For now the area is the one rebuilt from heat detections (about 14 hectares per pixel). When the perimeter arrives, this page picks it up on its own and keeps the same address.

Area with fire: ≈ 1,008ha; rebuilt from hotspots, no official perimeter yet
Duration: 8days; 14 Oct 2026 – 21 Oct 2026
Municipalities hit: 1; counties
Started on: 14 Oct; 2026
Heat detections: 125; in a single hotspot: 209 MW
Danger at start: 18; Moderate · FWI index
Energy released: 1.7GW; sum of detected power

Play back 21 Oct 2026

HOTSPOTS BY DAY 14 Oct21 Oct

How it evolved, day by day

1415161718192021

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

The weather it burned in

19°high

39km/h · peak gust

20%lowest humidity

It had gone 2 days without rain (1 mm or more) when it started.

What happened to each town

Harney where it started

1,008 ha reached on 14 Oct

0.0 %

Area with fire inside each county, rebuilt from heat detections (about 14 hectares per VIIRS pixel). An estimate until NIFC publishes the official perimeter. 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	Danger (FWI)
13 Oct	12.2 °C	28 %	32 km/h	Moderate 18
14 Oct	16.4 °C	36 %	32 km/h	Moderate 19
15 Oct	17.6 °C	20 %	27 km/h	High 24
16 Oct	17.8 °C	21 %	39 km/h	High 28
17 Oct	19.1 °C	20 %	30 km/h	High 29
18 Oct	17.0 °C	26 %	25 km/h	High 25
19 Oct	17.0 °C	22 %	27 km/h	High 28
20 Oct	17.7 °C	23 %	27 km/h	High 28

Before and after, from space

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

↔

Before · 7 Oct 2026

After · 23 Oct 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 17 October 2026 the air beside the fire reached 31 µg/m³ of PM2.5. That day averaged 20: 1.3 times the WHO daily guideline (15).

PM2.5 peak31 µg/m³

Days over the guideline1 day

PM1034 µg/m³

Optical depth0.16

WHO 15

111213141516171819

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 · 125Every 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 United States ›

Frequently asked questions

How long did the Harney fire last?: According to the heat detections seen by satellite, it burned from 14 October 2026 to 21 October 2026 (8 days between the first and the last detection). There is no perimeter yet to date it.
How much area did it burn?: There is no official perimeter yet: NIFC has not published it. Heat detections rebuild about 1,008 hectares with fire (10.1 km²).
Which counties burned?: The fire only entered Harney (1,008 ha, 0.0 %).
Is the Harney fire still active?: No fire detections since 21 Oct 2026, 21:14 UTC. A lack of detections is not an official extinction.
What was the weather like?: During the fire the temperature reached 19.1 °C, humidity dropped to 20 % and gusts hit 39 km/h. The fire danger index (FWI) reached 29, class High.
Where does this data come from?: From the official burnt perimeter of United States agencies (MTBS / NIFC, public domain), NASA FIRMS VIIRS hotspots and the administrative boundaries of United States. 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

Satellite cross-check

NASA FIRMS ↗
NIFC · Fire maps ↗

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.

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Where this data comes from

The perimeter is official and in the public domain. For past years it comes from MTBS (Monitoring Trends in Burn Severity), run by the U.S. Geological Survey and the USDA Forest Service, which map it on Landsat and Sentinel-2 imagery. For the current and last year it comes from WFIGS at the National Interagency Fire Center (NIFC): incident perimeters mapped by fire crews, aircraft and imagery. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. County boundaries come from geoBoundaries ADM2 (Public Domain). The area per county is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from official figures.

Where it burned