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Split Top Fire, August 2025 Power, Blaine

Out · last detection 24 Aug 2025, 09:50 UTC

The fire started on 24 August 2025 in Blaine, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 2,222 hectares, spread across 2 counties.

It is the 132th largest in Idaho since 2016 (of 379 with a page). Number 132 in United States in 2025, of 327.

The power measured by the satellite is low (9.9 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.

Burnt area
2,222ha
official perimeter (MTBS / NIFC)
Duration
1day
24 Aug 2025 – 24 Aug 2025
Municipalities hit
2
counties
Started on
24 Aug
2025
Heat detections
8
in a single hotspot: 10 MW
Danger at start
75
Very extreme · FWI index
Energy released
61MW
sum of detected power

Where it burned

HOTSPOTS BY DAY 24 Aug24 Aug

How it evolved, day by day

24

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

The weather it burned in

31°high
46km/h · peak gust
11%lowest humidity

It had gone more than two months without rain (1 mm or more) when it started. Rain came after the fire: 2.8 mm on 26 Aug.

This area had burned before

0% of the perimeter overlaps earlier fires recorded since 2016: 5 ha in 2019.

What happened to each town

  1. Power
    1,158 ha reached on 24 Aug
    0.3 %
  2. Blaine where it started
    1,066 ha reached on 24 Aug
    0.2 %

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)
24 Aug 30.8 °C 11 % 46 km/h 0.0 mm Very extreme 75
25 Aug after 24.6 °C 28 % 32 km/h 0.5 mm Very high 42
26 Aug after 26.9 °C 41 % 38 km/h 2.8 mm Moderate 16

Before and after, from space

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

Before · 17 Aug 2025
After · 31 Aug 2025

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 26 August 2025 the air beside the fire reached 20 µg/m³ of PM2.5. That day averaged 16: 1.1 times the WHO daily guideline (15).

PM2.5 peak20 µg/m³
Days over the guideline1 day
PM1023 µg/m³
Optical depth0.56
222324252627
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 · 8Every 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 timeSatelliteFRP (MW)LatLon

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Split Top fire last?
It burned between 24 August 2025 and 24 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 2,222 hectares (22.2 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire entered 2 counties: Power (1,158 ha, 0.3 %); Blaine (1,066 ha, 0.2 %).
What was the weather like?
During the fire the temperature reached 30.8 °C, humidity dropped to 11 % and gusts hit 46 km/h. The fire danger index (FWI) reached 75, class Very 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

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.

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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.

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.