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Walcott Fire, July 2024 Cassia

Out · last measured on 6 Jul 2024

The fire started on 6 July 2024 in Cassia, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 885 hectares, spread across a single county.

It is the 243th largest in Idaho since 2016 (of 379 with a page). Number 237 in United States in 2024, of 371.

We have the official perimeter (MTBS / NIFC) for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by county is there.

Burnt area
885ha
official perimeter (MTBS / NIFC)
Duration
1day
6 Jul 2024 – 6 Jul 2024
Municipalities hit
1
counties
Started on
6 Jul
2024
Danger at start
85
Very extreme · FWI index

Where it burned

The weather it burned in

35°high
66km/h · peak gust
7%lowest humidity

It had gone 9 days without rain (1 mm or more) when it started.

This area had burned before

43% of the perimeter overlaps earlier fires recorded since 2016: 382 ha in 2020.

What happened to each town

  1. Cassia where it started
    892 ha
    0.1 %

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)
6 Jul 34.9 °C 7 % 66 km/h 0.0 mm Very extreme 85
7 Jul after 33.7 °C 9 % 29 km/h 0.0 mm Extreme 53
8 Jul after 36.4 °C 8 % 32 km/h 0.0 mm Extreme 56
9 Jul after 38.0 °C 7 % 28 km/h 0.0 mm Extreme 56
10 Jul after 41.2 °C 2 % 32 km/h 0.0 mm Very extreme 72
11 Jul after 40.3 °C 7 % 49 km/h 0.0 mm Very extreme 86
12 Jul after 40.4 °C 6 % 49 km/h 0.0 mm Very extreme 92
13 Jul after 39.6 °C 3 % 35 km/h 0.0 mm Extreme 69
14 Jul after 36.6 °C 13 % 48 km/h 0.0 mm Very extreme 73
15 Jul after 35.0 °C 17 % 42 km/h 0.0 mm Extreme 66
16 Jul after 36.6 °C 8 % 30 km/h 0.0 mm Extreme 56

Before and after, from space

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

Before · 29 Jun 2024
After · 13 Jul 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 7 July 2024 the air beside the fire reached 10 µg/m³ of PM2.5, but no daily average passed the WHO guideline (15).

PM2.5 peak10 µg/m³
Days over the guideline0 days
PM1017 µg/m³
Optical depth0.13
456789
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)

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Walcott fire last?
It burned between 6 July 2024 and 6 July 2024: 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 885 hectares (8.8 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Cassia (892 ha, 0.1 %).
What was the weather like?
During the fire the temperature reached 34.9 °C, humidity dropped to 7 % and gusts hit 66 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

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
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.

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.