Box Fire, August 2025 Owyhee
The fire started on 13 August 2025 in Owyhee, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 1,747 hectares, spread across a single county.
It is the 158th largest in Idaho since 2016 (of 379 with a page). Number 148 in United States in 2025, of 327.
- Burnt area
- 1,747ha
- official perimeter (MTBS / NIFC)
- Duration
- 1day
- 13 Aug 2025 – 13 Aug 2025
- Municipalities hit
- 1
- counties
- Started on
- 13 Aug
- 2025
- Heat detections
- 189
- in a single hotspot: 129 MW
- Danger at start
- 62
- Extreme · FWI index
- Energy released
- 1.8GW
- sum of detected power
Where it burned
How it evolved, day by day
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: 6.1 mm on 26 Aug.
This area had burned before
89% of the perimeter overlaps earlier fires recorded since 2016: 1,554 ha in 2017.
What happened to each town
-
Owyhee where it started1,740 ha reached on 13 Aug0.1 %
Burnt area inside each county, from crossing the official 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) |
|---|---|---|---|---|---|
| 13 Aug | 33.7 °C | 13 % | 36 km/h | 0.2 mm | Extreme 62 |
| 14 Aug after | 30.4 °C | 13 % | 31 km/h | 0.0 mm | Extreme 53 |
| 15 Aug after | 29.8 °C | 16 % | 27 km/h | 0.0 mm | Very high 46 |
| 16 Aug after | 28.2 °C | 22 % | 39 km/h | 0.7 mm | Very high 43 |
| 17 Aug after | 27.0 °C | 31 % | 36 km/h | 0.8 mm | High 30 |
| 18 Aug after | 30.4 °C | 19 % | 26 km/h | 0.0 mm | Very high 38 |
| 19 Aug after | 32.5 °C | 10 % | 36 km/h | 0.0 mm | Extreme 57 |
| 20 Aug after | 30.2 °C | 16 % | 33 km/h | 0.0 mm | Extreme 54 |
| 21 Aug after | 31.1 °C | 12 % | 29 km/h | 0.0 mm | Extreme 53 |
| 22 Aug after | 33.7 °C | 10 % | 35 km/h | 0.0 mm | Extreme 58 |
| 23 Aug after | 33.3 °C | 13 % | 26 km/h | 0.0 mm | Extreme 50 |
| 24 Aug after | 25.2 °C | 21 % | 35 km/h | 0.8 mm | High 34 |
| 25 Aug after | 25.7 °C | 33 % | 23 km/h | 0.1 mm | High 34 |
| 26 Aug after | 21.2 °C | 44 % | 31 km/h | 6.1 mm | Very low 4 |
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 15 August 2025 the air beside the fire reached 19 µg/m³ of PM2.5, but no daily average passed the WHO 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 · 189Every satellite heat detection, one by one, with time, satellite, power and coordinates.
| Date and time | Satellite | FRP (MW) | Lat | Lon |
|---|
Other fires nearby
Frequently asked questions
- How long did the Box fire last?
- It burned between 13 August 2025 and 13 August 2025: 1 day, according to the start date recorded by United States agencies (MTBS / NIFC) and the heat detections seen by satellite.
- How much area did it burn?
- The official perimeter published by United States agencies (MTBS / NIFC) is 1,747 hectares (17.5 km²). Other tallies, such as daily incident reports, may give slightly different figures.
- Which counties burned?
- The fire only entered Owyhee (1,740 ha, 0.1 %).
- What was the weather like?
- During the fire the temperature reached 33.7 °C, humidity dropped to 10 % and gusts hit 39 km/h. The fire danger index (FWI) reached 62, class Extreme.
- 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
- NIFC · National Interagency Fire Center ↗
- InciWeb · Incident Information System ↗
- MTBS · Monitoring Trends in Burn Severity ↗
Satellite cross-check
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
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.