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Yeti Fire, July 2022 Siskiyou

Out · last detection 4 Sept 2022, 10:33 UTC

The fire started on 30 July 2022 in Siskiyou, United States, and satellites saw it burning for 37 days. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 3,164 hectares, spread across a single county.

It is the 166th largest in California since 2016 (of 442 with a page). Number 141 in United States in 2022, of 493.

The power measured by the satellite is low (0.5 MW in the strongest hotspot), more typical of grass or stubble burning, or a slow surface fire, than of a large crown fire.

Compare with…

Suggestions: Abney · 2017Gap · 2016Natchez · 2018Slater · 2020

Burnt area
3,164ha
official perimeter (MTBS / NIFC)
Duration
≈ 37days
30 Jul 2022 – 4 Sept 2022
Counties hit
1
counties
Started on
30 Jul
2022
Heat detections
1
in a single hotspot: 0 MW
Danger at start
37
High · FWI index

Where it burned

HOTSPOTS BY DAY 30 Jul4 Sept

How it evolved, day by day

4 Sept 2022 · 0 MW · 1

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

The weather it burned in

34°high
45km/h · peak gust
10%lowest humidity

It had gone one day 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% of the area of London (32 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. Siskiyou where it started
    3,183 ha reached on 4 Sept
    0.2 %

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 2020
Built-up area0.12 ha
Residents< 20

Inside the perimeter there were about 0.12 hectares of built-up land and almost nobody lived there (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)
30 Jul 33.4 °C 24 % 29 km/h 0.0 mm High 37
31 Jul 31.4 °C 34 % 30 km/h 1.0 mm Moderate 21
1 Aug 28.5 °C 40 % 29 km/h 1.9 mm Low 10
2 Aug 29.7 °C 35 % 36 km/h 0.7 mm Moderate 18
3 Aug 31.1 °C 12 % 45 km/h 0.0 mm Very high 40
4 Aug 31.7 °C 19 % 38 km/h 0.0 mm Very high 38
5 Aug 29.0 °C 30 % 41 km/h 0.2 mm High 34
6 Aug 28.7 °C 34 % 31 km/h 0.5 mm High 29
7 Aug 31.5 °C 20 % 30 km/h 0.0 mm High 32
8 Aug 30.0 °C 19 % 34 km/h 0.0 mm High 33
9 Aug 28.8 °C 20 % 44 km/h 0.0 mm High 36
10 Aug 24.7 °C 25 % 40 km/h 0.0 mm High 34
11 Aug 26.6 °C 22 % 40 km/h 0.0 mm High 34
12 Aug 26.2 °C 19 % 41 km/h 0.0 mm High 36
13 Aug 28.2 °C 14 % 36 km/h 0.0 mm High 38
14 Aug 29.1 °C 20 % 35 km/h 0.0 mm High 38
15 Aug 30.5 °C 20 % 41 km/h 0.0 mm Very high 39
16 Aug 33.6 °C 16 % 39 km/h 0.0 mm Very high 39
17 Aug 32.8 °C 17 % 34 km/h 0.1 mm Very high 38
18 Aug 30.2 °C 26 % 30 km/h 0.3 mm High 34
19 Aug 30.2 °C 24 % 40 km/h 0.0 mm Very high 39
20 Aug 30.7 °C 18 % 33 km/h 0.0 mm High 36
21 Aug 30.8 °C 19 % 45 km/h 0.0 mm Very high 40
22 Aug 27.5 °C 24 % 37 km/h 0.0 mm High 37
23 Aug 29.2 °C 25 % 36 km/h 0.0 mm High 36
24 Aug 31.2 °C 22 % 37 km/h 0.0 mm High 37
25 Aug 32.1 °C 22 % 36 km/h 0.0 mm High 36
26 Aug 30.6 °C 23 % 42 km/h 0.0 mm Very high 40
27 Aug 27.4 °C 26 % 39 km/h 0.0 mm High 37
28 Aug 29.9 °C 22 % 35 km/h 0.0 mm High 35
29 Aug 32.0 °C 17 % 35 km/h 0.0 mm High 38
30 Aug 32.1 °C 16 % 33 km/h 0.0 mm Very high 38
31 Aug 31.2 °C 13 % 37 km/h 0.0 mm Very high 42
1 Sept 33.9 °C 10 % 22 km/h 0.0 mm Very high 42
2 Sept 32.1 °C 14 % 39 km/h 0.0 mm Very high 46
3 Sept 27.7 °C 17 % 32 km/h 0.0 mm Very high 43
4 Sept 31.0 °C 14 % 30 km/h 0.0 mm Very high 42
5 Sept after 34.3 °C 12 % 30 km/h 0.0 mm Very high 44
6 Sept after 35.0 °C 13 % 47 km/h 0.0 mm Very high 47
7 Sept after 34.5 °C 15 % 40 km/h 0.1 mm Very high 46
8 Sept after 30.7 °C 15 % 36 km/h 0.0 mm Very high 46
9 Sept after 33.6 °C 11 % 30 km/h 0.0 mm Very high 44
10 Sept after 31.5 °C 17 % 36 km/h 0.0 mm Very high 44
11 Sept after 24.5 °C 27 % 30 km/h 0.9 mm High 24
12 Sept after 25.5 °C 24 % 40 km/h 0.0 mm High 32
13 Sept after 22.1 °C 29 % 38 km/h 0.0 mm High 30
14 Sept after 21.4 °C 38 % 34 km/h 0.5 mm High 27

Before and after, from space

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

Before · 23 Jul 2022
After · 11 Sept 2022

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

Detections table · 1Every 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 Yeti Fire last?
The official perimeter only gives the start date (30 July 2022). The end comes from the heat detections inside the perimeter: it burned until 4 September 2022 (37 days from 30 July 2022), 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 3,164 hectares (31.6 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Siskiyou (3,183 ha, 0.2 %).
What was the weather like?
During the fire the temperature reached 33.9 °C, humidity dropped to 10 % and gusts hit 45 km/h. The fire danger index (FWI) reached 46, 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

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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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. One Suomi-NPP VIIRS detection 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.