How long did the Mckinney Fire last?

It burned between 29 July 2022 and 29 July 2022: 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 24,502 hectares (245.0 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire only entered Siskiyou (24,658 ha, 1.5 %).

What was the weather like?

During the fire the temperature reached 41.1 °C, humidity dropped to 9 % and gusts hit 27 km/h. The fire danger index (FWI) reached 50, class Very high.

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.

US · United States · 2022-07-29 → 2022-07-29

Mckinney Fire, July 2022 Siskiyou

Out · last measured on 29 Jul 2022

The fire started on 29 July 2022 in Siskiyou, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 24,502 hectares, spread across a single county.

It is the 46th largest in California since 2016 (of 442 with a page). Number 23 in United States in 2022, of 493.

Compare with…

Suggestions: Head · 2023 Gap · 2016 Klamathon · 2018 Abney · 2017

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: 24,502ha; official perimeter (MTBS / NIFC)
Duration: 1day; 29 Jul 2022 – 29 Jul 2022
Counties hit: 1; counties
Started on: 29 Jul; 2022
Danger at start: 50; Very high · FWI index

The weather it burned in

41°high

27km/h · peak gust

9%lowest humidity

It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 2.7 mm on 31 Jul.

This area had burned before

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

How big is it?

It burned the equivalent of 15% of the area of London (245 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

Siskiyou where it started

24,658 ha

1.5 %

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 2020

Built-up area6.8 ha

Residents≈ 150

Inside the perimeter there were about 6.8 hectares of built-up land and about 150 residents (GHSL 2020, 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.

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)
29 Jul	41.1 °C	9 %	27 km/h	0.0 mm	Very high 50
30 Jul after	39.0 °C	17 %	44 km/h	0.2 mm	Very high 48
31 Jul after	38.0 °C	24 %	36 km/h	2.7 mm	High 22

Before and after, from space

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

↔

Before · 22 Jul 2022

After · 5 Aug 2022

Before After

If the day is cloudy, change the date: each satellite passes once a day. In false colour the burnt ground looks brown or red.

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Mckinney Fire last?: It burned between 29 July 2022 and 29 July 2022: 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 24,502 hectares (245.0 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire only entered Siskiyou (24,658 ha, 1.5 %).
What was the weather like?: During the fire the temperature reached 41.1 °C, humidity dropped to 9 % and gusts hit 27 km/h. The fire danger index (FWI) reached 50, class Very high.
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

NASA FIRMS ↗
NIFC · Fire maps ↗

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.

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What really happened?

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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.

How we know this

Perimeter: MTBS (US Geological Survey and US Forest Service), 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 2020, 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.

Where it burned