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Otr 134 Fire, July 2024 Ada

Out · last detection 11 Aug 2024, 21:00 UTC

The fire started on 12 July 2024 in Ada, United States, and satellites saw it burning for 31 days. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 3,256 hectares, spread across a single county.

It is the 103th largest in Idaho since 2016 (of 379 with a page). Number 105 in United States in 2024, of 371.

Compare with…

Suggestions: Otr 196 · 2025Fraser · 2026Range · 2025Ada · 2025

Burnt area
3,256ha
official perimeter (MTBS / NIFC)
Duration
≈ 31days
12 Jul 2024 – 11 Aug 2024
Counties hit
1
counties
Started on
12 Jul
2024
Heat detections
21
in a single hotspot: 32 MW
Danger at start
65
Extreme · FWI index
Average daily power
334MW
detected power per day, on average

Where it burned

HOTSPOTS BY DAY 12 Jul11 Aug

How it evolved, day by day

11 Aug 2024 · 334 MW · 21

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

The weather it burned in

42°high
60km/h · peak gust
4%lowest humidity

It had gone 15 days without rain (1 mm or more) when it started.

This area had burned before

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

How big is it?

10 km
It burned the equivalent of 2.1% of the area of London (33 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 county

  1. Ada where it started
    3,238 ha reached on 11 Aug
    1.2 %

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 2025
Built-up area< 0.1 ha
Residents< 20

Inside 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)
12 Jul 41.1 °C 7 % 27 km/h 0.0 mm Extreme 65
13 Jul 41.1 °C 4 % 28 km/h 0.0 mm Extreme 67
14 Jul 37.3 °C 13 % 60 km/h 0.0 mm Very extreme 81
15 Jul 36.3 °C 15 % 37 km/h 0.0 mm Extreme 60
16 Jul 38.4 °C 6 % 32 km/h 0.0 mm Extreme 59
17 Jul 37.9 °C 12 % 28 km/h 0.0 mm Extreme 61
18 Jul 39.6 °C 9 % 33 km/h 0.0 mm Extreme 63
19 Jul 40.1 °C 11 % 35 km/h 0.0 mm Extreme 61
20 Jul 40.4 °C 12 % 30 km/h 0.0 mm Extreme 59
21 Jul 40.7 °C 9 % 41 km/h 0.0 mm Very extreme 71
22 Jul 40.0 °C 11 % 30 km/h 0.0 mm Extreme 58
23 Jul 40.8 °C 8 % 30 km/h 0.0 mm Extreme 59
24 Jul 39.4 °C 14 % 49 km/h 0.0 mm Very extreme 85
25 Jul 36.9 °C 20 % 39 km/h 0.1 mm Extreme 56
26 Jul 32.3 °C 17 % 35 km/h 0.0 mm Extreme 59
27 Jul 31.9 °C 17 % 36 km/h 0.0 mm Extreme 58
28 Jul 33.0 °C 15 % 28 km/h 0.0 mm Very high 46
29 Jul 34.3 °C 11 % 33 km/h 0.0 mm Extreme 61
30 Jul 29.2 °C 27 % 41 km/h 0.0 mm Extreme 52
31 Jul 35.1 °C 13 % 20 km/h 0.0 mm Very high 49
1 Aug 39.9 °C 5 % 22 km/h 0.0 mm Extreme 58
2 Aug 42.2 °C 4 % 22 km/h 0.0 mm Extreme 62
3 Aug 39.9 °C 11 % 23 km/h 0.0 mm Extreme 70
4 Aug 35.9 °C 19 % 33 km/h 0.0 mm Extreme 64
5 Aug 37.7 °C 18 % 31 km/h 0.1 mm Extreme 56
6 Aug 37.7 °C 9 % 35 km/h 0.0 mm Extreme 62
7 Aug 34.5 °C 9 % 38 km/h 0.0 mm Extreme 63
8 Aug 36.0 °C 8 % 28 km/h 0.0 mm Extreme 63
9 Aug 36.8 °C 9 % 33 km/h 0.0 mm Extreme 57
10 Aug 35.5 °C 13 % 44 km/h 0.0 mm Extreme 65
11 Aug 35.9 °C 8 % 22 km/h 0.0 mm Extreme 54
12 Aug after 35.7 °C 13 % 30 km/h 0.0 mm Extreme 57
13 Aug after 31.8 °C 18 % 45 km/h 0.2 mm Extreme 54
14 Aug after 31.1 °C 14 % 35 km/h 0.0 mm Extreme 51
15 Aug after 30.9 °C 17 % 37 km/h 0.2 mm Extreme 60
16 Aug after 31.2 °C 21 % 26 km/h 0.0 mm Extreme 51
17 Aug after 38.8 °C 7 % 38 km/h 0.0 mm Extreme 68
18 Aug after 33.8 °C 15 % 43 km/h 0.0 mm Extreme 68
19 Aug after 36.4 °C 6 % 39 km/h 0.0 mm Very extreme 71
20 Aug after 31.6 °C 13 % 35 km/h 0.0 mm Extreme 57
21 Aug after 29.9 °C 18 % 41 km/h 0.0 mm Extreme 58

Before and after, from space

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

Before · 5 Jul 2024
After · 18 Aug 2024

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 15 July 2024 the air beside the fire reached 25 µg/m³ of PM2.5. That day averaged 20: 1.3 times the WHO daily guideline (15).

PM2.5 peak25 µg/m³
Days over the guideline1 day
PM1045 µg/m³
Optical depth0.83
10 Jul12 Jul14 Jul
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 · 21Every 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 Otr 134 Fire last?
The official perimeter only gives the start date (12 July 2024). The end comes from the heat detections inside the perimeter: it burned until 11 August 2024 (31 days from 12 July 2024), the last day with detections before more than 10 days in a row without any, so it is approximate.
How much area did it burn?
The official perimeter published by United States agencies (MTBS / NIFC) is 3,256 hectares (32.6 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Ada (3,238 ha, 1.2 %).
What was the weather like?
During the fire the temperature reached 42.2 °C, humidity dropped to 4 % and gusts hit 60 km/h. The fire danger index (FWI) reached 85, 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 · Emergency number and official warnings

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.

RSS Changes to this page

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?

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.

How we know this
  • Perimeter: MTBS (US Geological Survey and US Forest Service), official.
  • The official perimeter has no end date: the end is the last day with VIIRS detections inside the perimeter before a gap of more than 10 days (150 days at most), so it is approximate. 21 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.

How we build fire pages: methodology

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.