How long did the Riggs fire last?

It burned between 25 August 2018 and 25 August 2018: 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 942 hectares (9.4 km²). Other tallies, such as daily incident reports, may give slightly different figures.

Which counties burned?

The fire only entered Kane (944 ha, 0.1 %).

What was the weather like?

During the fire the temperature reached 27.2 °C, humidity dropped to 3 % and gusts hit 73 km/h. The fire danger index (FWI) reached 63, 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.

US · United States · 2018-08-25 → 2018-08-25

Riggs Fire, August 2018 Kane

Out · last measured on 25 Aug 2018

The fire started on 25 August 2018 in Kane, United States, and satellites saw it burning for 1 day. United States agencies (MTBS / NIFC) mapped an official burnt perimeter of 942 hectares, spread across a single county.

It is the 110th largest in Utah since 2016 (of 165 with a page). Number 335 in United States in 2018, of 511.

Burnt area: 942ha; official perimeter (MTBS / NIFC)
Duration: 1day; 25 Aug 2018 – 25 Aug 2018
Municipalities hit: 1; counties
Started on: 25 Aug; 2018
Heat detections: 288; in a single hotspot: 521 MW
Danger at start: 11; Low · FWI index

HOTSPOTS BY DAY 25 Aug25 Aug

The weather it burned in

27°high

73km/h · peak gust

3%lowest humidity

It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 12.3 mm on 2 Oct.

This area had burned before

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

What happened to each town

Kane where it started

944 ha reached on 27 Aug

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)
25 Aug	25.1 °C	23 %	40 km/h	1.9 mm	Low 11
26 Aug after	23.6 °C	27 %	57 km/h	0.2 mm	High 22
27 Aug after	25.2 °C	11 %	58 km/h	0.0 mm	High 35
28 Aug after	25.4 °C	8 %	47 km/h	0.0 mm	High 35
29 Aug after	25.8 °C	10 %	46 km/h	0.0 mm	High 37
30 Aug after	25.2 °C	13 %	58 km/h	0.0 mm	Very high 43
31 Aug after	25.3 °C	13 %	54 km/h	0.0 mm	Very high 42
1 Sept after	23.9 °C	11 %	35 km/h	0.0 mm	High 32
2 Sept after	24.6 °C	14 %	24 km/h	0.0 mm	High 31
3 Sept after	23.2 °C	15 %	36 km/h	0.2 mm	High 33
4 Sept after	21.1 °C	29 %	35 km/h	3.1 mm	Low 5
5 Sept after	19.9 °C	33 %	29 km/h	1.6 mm	Low 7
6 Sept after	24.4 °C	25 %	24 km/h	0.7 mm	Moderate 14
7 Sept after	25.9 °C	17 %	34 km/h	0.0 mm	High 26
8 Sept after	26.4 °C	16 %	40 km/h	0.0 mm	High 31
9 Sept after	27.1 °C	11 %	33 km/h	0.0 mm	High 35
10 Sept after	27.2 °C	10 %	48 km/h	0.0 mm	Very high 43
11 Sept after	26.6 °C	8 %	49 km/h	0.0 mm	Very high 46
12 Sept after	25.3 °C	7 %	68 km/h	0.0 mm	Extreme 57
13 Sept after	24.1 °C	6 %	65 km/h	0.0 mm	Extreme 56
14 Sept after	25.3 °C	7 %	49 km/h	0.0 mm	Very high 48
15 Sept after	26.6 °C	10 %	73 km/h	0.0 mm	Extreme 63
16 Sept after	26.2 °C	19 %	60 km/h	0.0 mm	Extreme 50
17 Sept after	26.0 °C	18 %	51 km/h	0.0 mm	Very high 45
18 Sept after	26.1 °C	13 %	59 km/h	0.0 mm	Extreme 51
19 Sept after	23.3 °C	7 %	61 km/h	0.0 mm	Extreme 55
20 Sept after	24.1 °C	5 %	26 km/h	0.0 mm	Very high 40
21 Sept after	24.2 °C	6 %	34 km/h	0.0 mm	Very high 43
22 Sept after	23.9 °C	13 %	45 km/h	0.0 mm	Very high 49
23 Sept after	22.2 °C	26 %	55 km/h	0.4 mm	Very high 44
24 Sept after	22.8 °C	16 %	54 km/h	0.0 mm	Very high 44
25 Sept after	23.1 °C	12 %	30 km/h	0.3 mm	High 36
26 Sept after	24.8 °C	3 %	36 km/h	0.0 mm	Very high 48
27 Sept after	26.9 °C	5 %	40 km/h	0.0 mm	Extreme 50
28 Sept after	25.7 °C	6 %	46 km/h	0.0 mm	Extreme 56
29 Sept after	23.1 °C	17 %	64 km/h	0.0 mm	Extreme 58
30 Sept after	21.2 °C	24 %	72 km/h	0.0 mm	Extreme 54
1 Oct after	21.2 °C	32 %	40 km/h	0.0 mm	High 33
2 Oct after	14.6 °C	61 %	37 km/h	12.3 mm	Very low 0

Before and after, from space

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

↔

Before · 18 Aug 2018

After · 1 Sept 2018

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.

Detections table · 288Every 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 time	Satellite	FRP (MW)	Lat	Lon

Other fires nearby

All fires in United States ›

Frequently asked questions

How long did the Riggs fire last?: It burned between 25 August 2018 and 25 August 2018: 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 942 hectares (9.4 km²). Other tallies, such as daily incident reports, may give slightly different figures.
Which counties burned?: The fire only entered Kane (944 ha, 0.1 %).
What was the weather like?: During the fire the temperature reached 27.2 °C, humidity dropped to 3 % and gusts hit 73 km/h. The fire danger index (FWI) reached 63, 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

NASA FIRMS ↗
NIFC · Fire maps ↗

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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