How long did the Kenora, Unorganized fire last?

It burned between 14 June 2017 and 28 July 2017: 45 days, according to the dates recorded by Canada’s CWFIS and the heat detections seen by satellite.

How much area did it burn?

The official perimeter mapped by Canada’s CWFIS (Natural Resources Canada) is 7,749 hectares (77.5 km²). Other tallies, such as those of provincial agencies, may give slightly different figures.

Which census subdivisions burned?

The fire only entered Kenora, Unorganized (8,044 ha, 0.0 %).

What was the weather like?

During the fire the temperature reached 27.6 °C, humidity dropped to 28 % and gusts hit 66 km/h. The fire danger index (FWI) reached 24, class High.

Where does this data come from?

From the official burnt perimeter of Canada’s CWFIS (NBAC, Natural Resources Canada) or, for the current season and until NBAC publishes it, the one rebuilt by GWIS (Copernicus); from NASA FIRMS VIIRS hotspots; and from the administrative boundaries of Canada. It is not an official report.

CA · Canada · 2017-06-14 → 2017-07-28

Kenora, Unorganized fire, 14 June 2017 Kenora, Unorganized

Out · last detection 28 Jul 2017, 17:46 UTC

The fire started on 14 June 2017 in Kenora, Unorganized, Canada, and satellites saw it burning for 45 days. Canada’s CWFIS (Natural Resources Canada) mapped an official burnt perimeter of 7,749 hectares from satellite imagery, spread across a single census subdivision.

It is the 70th largest in Ontario since 2016 (of 247 with a page). Number 59 in Canada in 2017, of 242.

Compare with…

Burnt area: 7,749ha; official perimeter (CWFIS)
Duration: 45days; 14 Jun 2017 – 28 Jul 2017
Census subdivisions hit: 1; municipalities
Started on: 14 Jun; 2017
Heat detections: 821; in a single hotspot: 368 MW
Danger at start: 3; Very low · FWI index
Average daily power: 990MW; detected power per day, on average

HOTSPOTS BY DAY 14 Jun28 Jul

Play back 28 Jul 2017

How it evolved, day by day

6 Jul 12 Jul 14 Jul 16 Jul 18 Jul 23 Jul 25 Jul

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

The weather it burned in

28°high

66km/h · peak gust

28%lowest humidity

It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 2.5 mm on 29 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 4.9% of the area of London (77 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 census subdivision

Kenora, Unorganized where it started

8,044 ha reached on 6 Jul

0.0 %

Burnt area inside each census subdivision, 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 2015

Built-up area< 0.1 ha

Residents< 20

Inside the perimeter there was no noticeable built-up land and almost nobody lived there (GHSL 2015, 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)
14 Jun	13.4 °C	42 %	46 km/h	0.0 mm	Very low 3
15 Jun	11.1 °C	65 %	46 km/h	2.0 mm	Very low 1
16 Jun	15.0 °C	76 %	44 km/h	0.2 mm	Very low 2
17 Jun	10.0 °C	84 %	28 km/h	0.7 mm	Very low 1
18 Jun	10.1 °C	82 %	35 km/h	0.0 mm	Very low 1
19 Jun	13.4 °C	59 %	46 km/h	0.0 mm	Very low 3
20 Jun	14.2 °C	52 %	49 km/h	0.0 mm	Low 6
21 Jun	18.7 °C	37 %	27 km/h	0.0 mm	Low 7
22 Jun	20.9 °C	35 %	44 km/h	0.0 mm	Moderate 12
23 Jun	17.5 °C	52 %	44 km/h	0.3 mm	Moderate 12
24 Jun	10.2 °C	51 %	54 km/h	0.0 mm	Moderate 12
25 Jun	13.6 °C	42 %	36 km/h	0.0 mm	Low 9
26 Jun	15.3 °C	47 %	28 km/h	0.2 mm	Low 8
27 Jun	17.0 °C	51 %	34 km/h	0.2 mm	Low 10
28 Jun	16.1 °C	51 %	37 km/h	0.0 mm	Low 11
29 Jun	18.9 °C	46 %	37 km/h	0.0 mm	Moderate 12
30 Jun	18.4 °C	43 %	40 km/h	0.0 mm	Moderate 12
1 Jul	20.5 °C	50 %	36 km/h	0.0 mm	Moderate 12
2 Jul	16.0 °C	53 %	51 km/h	0.0 mm	Moderate 15
3 Jul	20.8 °C	41 %	37 km/h	0.0 mm	Moderate 14
4 Jul	26.3 °C	28 %	35 km/h	0.0 mm	High 22
5 Jul	24.7 °C	52 %	43 km/h	5.5 mm	Very low 3
6 Jul	18.3 °C	67 %	54 km/h	1.7 mm	Very low 4
7 Jul	22.6 °C	35 %	27 km/h	0.0 mm	Low 9
8 Jul	16.6 °C	41 %	52 km/h	6.0 mm	Very low 3
9 Jul	17.4 °C	49 %	51 km/h	5.1 mm	Very low 1
10 Jul	12.2 °C	50 %	64 km/h	4.3 mm	Very low 1
11 Jul	13.0 °C	63 %	64 km/h	0.0 mm	Very low 4
12 Jul	20.1 °C	37 %	36 km/h	0.0 mm	Low 6
13 Jul	25.8 °C	30 %	38 km/h	0.0 mm	Moderate 13
14 Jul	27.0 °C	34 %	58 km/h	3.5 mm	Low 7
15 Jul	16.4 °C	47 %	36 km/h	0.0 mm	Low 7
16 Jul	26.5 °C	29 %	40 km/h	0.0 mm	Moderate 15
17 Jul	27.2 °C	36 %	66 km/h	0.0 mm	High 24
18 Jul	23.5 °C	53 %	46 km/h	1.1 mm	Low 10
19 Jul	19.5 °C	43 %	53 km/h	0.3 mm	Moderate 14
20 Jul	17.7 °C	52 %	57 km/h	5.9 mm	Very low 3
21 Jul	14.0 °C	43 %	54 km/h	0.0 mm	Low 6
22 Jul	17.7 °C	39 %	32 km/h	0.0 mm	Low 8
23 Jul	20.4 °C	39 %	28 km/h	0.0 mm	Low 11
24 Jul	26.6 °C	34 %	37 km/h	0.0 mm	Moderate 16
25 Jul	27.6 °C	44 %	55 km/h	0.2 mm	Moderate 20
26 Jul	24.1 °C	52 %	59 km/h	4.5 mm	Low 5
27 Jul	20.9 °C	48 %	48 km/h	0.0 mm	Low 10
28 Jul	25.8 °C	46 %	38 km/h	1.4 mm	Low 6
29 Jul after	30.6 °C	39 %	43 km/h	2.5 mm	Low 8

Before and after, from space

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

↔

Before · 7 Jun 2017

After · 4 Aug 2017

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 · 821Every 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

Frequently asked questions

How long did the Kenora, Unorganized fire last?: It burned between 14 June 2017 and 28 July 2017: 45 days, according to the dates recorded by Canada’s CWFIS and the heat detections seen by satellite.
How much area did it burn?: The official perimeter mapped by Canada’s CWFIS (Natural Resources Canada) is 7,749 hectares (77.5 km²). Other tallies, such as those of provincial agencies, may give slightly different figures.
Which census subdivisions burned?: The fire only entered Kenora, Unorganized (8,044 ha, 0.0 %).
What was the weather like?: During the fire the temperature reached 27.6 °C, humidity dropped to 28 % and gusts hit 66 km/h. The fire danger index (FWI) reached 24, class High.
Where does this data come from?: From the official burnt perimeter of Canada’s CWFIS (NBAC, Natural Resources Canada) or, for the current season and until NBAC publishes it, the one rebuilt by GWIS (Copernicus); from NASA FIRMS VIIRS hotspots; and from the administrative boundaries of Canada. 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 ↗
CWFIS · Interactive map ↗

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 do you think is wrong?

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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: NBAC (Natural Resources Canada), official.
Dates from the perimeter: the VIIRS detections inside it did not change them. 821 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 2015, 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: it comes from the National Burned Area Composite (NBAC) of the Canadian Wildland Fire Information System (CWFIS), Natural Resources Canada, which maps it on satellite imagery and publishes it under the Open Government Licence – Canada. Until NBAC publishes the current season, this year’s fires carry the perimeter rebuilt from heat detections by GWIS (Copernicus, CC BY 4.0), which is approximate. Heat detections come from the VIIRS sensors aboard Suomi-NPP and NOAA-20, distributed by NASA FIRMS at 375 m resolution. Census subdivision boundaries come from geoBoundaries ADM3 (Open Data Commons Open Database License 1.0). The area per census subdivision is computed by WorldFires by crossing the perimeter with those boundaries, so it may differ slightly from official figures.

Where it burned