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Mill Fire, September 2022 Siskiyou

Out · last detection 3 Sept 2022, 10:52 UTC

The fire started on 2 September 2022 in Siskiyou, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 1,787 hectares, spread across a single county.

It is the 220th largest in California since 2016 (of 442 with a page). Number 216 in United States in 2022, of 493.

Burnt area
1,787ha
official perimeter (MTBS / NIFC)
Duration
1day
2 Sept 2022 – 2 Sept 2022
Municipalities hit
1
counties
Started on
2 Sept
2022
Heat detections
83
in a single hotspot: 220 MW
Danger at start
59
Extreme · FWI index
Energy released
4.1GW
sum of detected power

Where it burned

3 Sept 2022
HOTSPOTS BY DAY 2 Sept2 Sept

How it evolved, day by day

23

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

The weather it burned in

36°high
50km/h · peak gust
6%lowest humidity

It had gone 27 days without rain (1 mm or more) when it started. Rain came after the fire: 1.1 mm on 12 Sept.

This area had burned before

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

What happened to each town

  1. Siskiyou where it started
    1,790 ha reached on 2 Sept
    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)
2 Sept 36.0 °C 6 % 50 km/h 0.0 mm Extreme 59
3 Sept after 33.0 °C 12 % 27 km/h 0.0 mm Very high 48
4 Sept after 35.0 °C 13 % 33 km/h 0.0 mm Extreme 50
5 Sept after 38.4 °C 10 % 23 km/h 0.0 mm Very high 48
6 Sept after 38.3 °C 14 % 32 km/h 0.0 mm Very high 50
7 Sept after 36.6 °C 15 % 45 km/h 0.3 mm Extreme 54
8 Sept after 34.0 °C 16 % 34 km/h 0.0 mm Extreme 50
9 Sept after 35.6 °C 11 % 21 km/h 0.0 mm Very high 45
10 Sept after 33.0 °C 16 % 41 km/h 0.0 mm Very high 49
11 Sept after 28.9 °C 24 % 31 km/h 0.7 mm High 30
12 Sept after 30.0 °C 25 % 28 km/h 1.1 mm High 26

Before and after, from space

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

Before · 26 Aug 2022
After · 9 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.

The smoke

CAMS · Copernicus

On 4 September 2022 the air beside the fire reached 103 µg/m³ of PM2.5. That day averaged 55: 3.7 times the WHO daily guideline (15).

PM2.5 peak103 µg/m³
Days over the guideline3 days
PM10148 µg/m³
Optical depth1.04
3112345
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 · 83Every 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 Mill fire last?
It burned between 2 September 2022 and 2 September 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 1,787 hectares (17.9 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?
The fire only entered Siskiyou (1,790 ha, 0.1 %).
What was the weather like?
During the fire the temperature reached 36.0 °C, humidity dropped to 6 % and gusts hit 50 km/h. The fire danger index (FWI) reached 59, class 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.