Bigfoot Fire, August 2026 Ada
The fire started on 15 August 2026 in Ada, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 459 hectares, spread across a single county.
It is the 354th largest in Idaho since 2016 (of 379 with a page). Number 386 in United States in 2026, of 423.
Compare with…
We have the official perimeter (MTBS / NIFC) for this fire, but not yet its hotspots: NASA publishes the yearly hotspot archive only once the year closes. The page picks them up automatically when they are available.
- Burnt area
- 459ha
- official perimeter (MTBS / NIFC)
- Duration
- 1day
- 15 Aug 2026 – 15 Aug 2026
- Counties hit
- 1
- counties
- Started on
- 15 Aug
- 2026
- Danger at start
- 54
- Extreme · FWI index
Where it burned
The weather it burned in
It had gone 48 days without rain (1 mm or more) when it started.
This area had burned before
33% of the perimeter overlaps earlier fires recorded since 2016: 150 ha in 2017.
What happened to each county
-
Ada where it started458 ha0.2 %
Burnt area inside each county, 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.
People and buildings inside the perimeter
GHSL 2025Inside 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) |
|---|---|---|---|---|---|
| 15 Aug | 34.1 °C | 16 % | 44 km/h | 0.0 mm | Extreme 54 |
| 16 Aug after | 35.4 °C | 14 % | 35 km/h | 0.0 mm | Very high 48 |
| 17 Aug after | 34.4 °C | 16 % | 26 km/h | 0.0 mm | Extreme 51 |
| 18 Aug after | 36.0 °C | 12 % | 33 km/h | 0.0 mm | Extreme 54 |
| 19 Aug after | 37.3 °C | 7 % | 25 km/h | 0.0 mm | Extreme 57 |
| 20 Aug after | 38.8 °C | 9 % | 33 km/h | 0.0 mm | Extreme 66 |
| 21 Aug after | 39.1 °C | 7 % | 34 km/h | 0.0 mm | Extreme 64 |
| 22 Aug after | 36.6 °C | 15 % | 33 km/h | 0.4 mm | Extreme 62 |
| 23 Aug after | 33.1 °C | 11 % | 35 km/h | 0.0 mm | Extreme 64 |
| 24 Aug after | 33.3 °C | 12 % | 23 km/h | 0.0 mm | Extreme 52 |
| 25 Aug after | 37.2 °C | 11 % | 30 km/h | 0.0 mm | Extreme 64 |
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 13 August 2026 the air beside the fire reached 36 µg/m³ of PM2.5. That day averaged 31: 2.1 times the WHO daily 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)
Other fires nearby
Frequently asked questions
- How long did the Bigfoot Fire last?
- It burned between 15 August 2026 and 15 August 2026: 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 459 hectares (4.6 km²). Other tallies, such as daily incident reports, may give slightly different figures.
- Which counties burned?
- The fire only entered Ada (458 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 34.1 °C, humidity dropped to 16 % and gusts hit 44 km/h. The fire danger index (FWI) reached 54, 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 · Emergency number and official warnings ›
- NIFC · National Interagency Fire Center ↗
- InciWeb · Incident Information System ↗
- MTBS · Monitoring Trends in Burn Severity ↗
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.
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: NIFC WFIGS (United States), official.
- Dates from the perimeter: the VIIRS detections inside it did not change them. No 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 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.