Burned area
satellite only3,050ha
Perimeter published by NBAC (NRCan).
- Source
- NBAC (NRCan)
- Date
- 28 Jul 2018 – 26 Aug 2018
+− cross-check
No official record is matched to this page to compare it with.
CA · Canada · –
Rainy River, Unorganized fire, July 2018 Rainy River, Unorganized
Out · last detection 26 Aug 2018, 08:11 UTC
The fire started on 28 July 2018 in Rainy River, Unorganized, Canada, and satellites saw it burning for 30 days. Canada’s CWFIS (Natural Resources Canada) mapped an official burnt perimeter of 3,050 hectares from satellite imagery, spread across a single census subdivision.
It is the 86th largest in Ontario since 2016 (of 144 with a page). Number 115 in Canada in 2018, of 212.
Use this data
Compare with…
Use this data
Fire page data · version 2026-10-24matches the official recordwith caveatssatellite onlymodel
When copying, the sentence is
Tick the figures you want: they make up the lede and the CSV.
Duration by satellite
satellite only30days
28 Jul 2018 to 26 Aug 2018: first and last day with fire on the page.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- last detection: 26 Aug 2018, 08:11 UTC
+− cross-check
Satellites pass a few times a day and cloud or smoke can hide the fire: a lack of detections is not an official extinction. Each country’s emergency service declares a fire contained or out.
Start
satellite only28 Jul 2018
First day with fire seen by the satellites or the perimeter.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- 28 Jul 2018
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only166
VIIRS detections at 375 m. Most intense hotspot: 86 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 28 Jul 2018 – 26 Aug 2018
+− cross-check
There is no official record to compare with. Each hotspot is a pixel detected in one satellite pass, not a separate fire.
The worst day
satellite only1,218MW
Total radiative power on 23 August 2018; hotspots that day: 126.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 23 Aug 2018
+− cross-check
Fire radiative power (FRP) measures the energy the fire gives off when the satellite passes. Added up by day, it compares intensity, not area.
Danger at the start
model0.6FWI · very low
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 1.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 28 Jul 2018, local noon
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
This is an index computed from weather model data, not a measurement of the fire nor an official warning. Danger warnings are issued by each country’s authority. Emergency number and official warnings
Weather during the fire
model31.6°C · 36% RH
High of 31.6 °C and minimum humidity of 36% on 11 August 2018; gusts of 50 km/h on 22 August 2018.
- Source
- weather model at the fire’s grid cell
- Date
- 28 Jul 2018 – 26 Aug 2018
- Model
- ERA5 0,25° (ECMWF · Copernicus C3S) · Open-Meteo.com
+− cross-check
These are model values for a cell of about 25 km, not from a weather station: they may differ from what was measured on the ground.
This page’s change log has been kept since 24 October 2026: every night what it publishes is compared and the difference is logged. Anything earlier is reconstructed from each source’s date and marked as reconstructed.
Show
-
· reconstructed weatherWeather and FWI computed from the ERA5 reanalysis
-
· reconstructed GHSLPopulation and built-up area computed
What was saved on 24 October 2026
Every night a snapshot of what the page shows is saved. If anything changes, it appears in the list as a log entry.
- Area
- 3,050 ha
- Dates
- 28 Jul 2018 – 26 Aug 2018
- Name
- Rainy River, Unorganized
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/rainy-river-unorganized-2018-07?v=2026-10-24A version keeps the area, dates, name and official record; the area as it was logged (changes under 2% are not logged). The map, hotspots and weather always show today’s data.
Citation
A lede of about 60 words figures only, no adjectives
CSV for this fire rainy-river-unorganized-2018-07.csv · daily, no individual hotspots
| fecha | focos_viirs | frp_mw | tmax_c | tmin_c | hr_min_pct | viento_max_kmh | racha_max_kmh | precip_mm | fwi | clase_fwi | dentro_del_incendio |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018-07-28 | 0 | 0 | 24.5 | 12.6 | 45 | 11.1 | 28.8 | 6.5 | 0.6 | muy_bajo | 1 |
| 2018-07-29 | 0 | 0 | 25.1 | 13.2 | 47 | 9.4 | 27 | 2 | 0.8 | muy_bajo | 1 |
| 2018-07-30 | 0 | 0 | 26.8 | 14.5 | 41 | 11.7 | 23.8 | 0.1 | 5.2 | muy_bajo | 1 |
| 2018-07-31 | 0 | 0 | 26.4 | 16.1 | 39 | 19.1 | 44.6 | 6 | 1.7 | muy_bajo | 1 |
| 2018-08-01 | 0 | 0 | 15.6 | 9.7 | 70 | 18.6 | 41.4 | 8.3 | 0.1 | muy_bajo | 1 |
| 2018-08-02 | 0 | 0 | 19.3 | 9.6 | 51 | 9.1 | 21.2 | 0 | 0.5 | muy_bajo | 1 |
| 2018-08-03 | 0 | 0 | 23 | 11.7 | 50 | 14.8 | 33.1 | 0 | 2.5 | muy_bajo | 1 |
| 2018-08-04 | 0 | 0 | 23.2 | 14.5 | 66 | 18.1 | 47.2 | 12.5 | 0.2 | muy_bajo | 1 |
| 2018-08-05 | 0 | 0 | 26.8 | 16.7 | 45 | 17.6 | 48.6 | 4.1 | 0.6 | muy_bajo | 1 |
| 2018-08-06 | 0 | 0 | 18.7 | 14.7 | 67 | 12.9 | 25.9 | 0.2 | 0.8 | muy_bajo | 1 |
| 2018-08-07 | 0 | 0 | 25.2 | 12.8 | 46 | 14.3 | 22.7 | 0 | 4 | muy_bajo | 1 |
| 2018-08-08 | 0 | 0 | 26.3 | 16.7 | 55 | 14 | 36.4 | 2.1 | 1 | muy_bajo | 1 |
| 2018-08-09 | 0 | 0 | 27.7 | 16.2 | 40 | 11.7 | 25.9 | 0 | 5.5 | bajo | 1 |
| 2018-08-10 | 0 | 0 | 28.8 | 15 | 40 | 16.6 | 38.2 | 0.2 | 9.7 | bajo | 1 |
| 2018-08-11 | 0 | 0 | 31.6 | 15.5 | 36 | 11 | 23 | 0 | 10.7 | bajo | 1 |
| 2018-08-12 | 0 | 0 | 31.1 | 19.2 | 39 | 14.7 | 30.2 | 0 | 13 | moderado | 1 |
| 2018-08-13 | 0 | 0 | 30.1 | 20.2 | 48 | 22.2 | 47.2 | 0 | 16 | moderado | 1 |
| 2018-08-14 | 0 | 0 | 23.6 | 15.8 | 47 | 15.1 | 31.3 | 0 | 12.4 | moderado | 1 |
| 2018-08-15 | 0 | 0 | 24.6 | 12.3 | 46 | 9.6 | 21.6 | 0 | 11 | bajo | 1 |
| 2018-08-16 | 0 | 0 | 26.6 | 15.4 | 46 | 9.8 | 25.2 | 0 | 11.6 | moderado | 1 |
| 2018-08-17 | 0 | 0 | 23.9 | 16.2 | 59 | 11.3 | 27.7 | 0.1 | 10 | bajo | 1 |
| 2018-08-18 | 0 | 0 | 24.9 | 15.3 | 56 | 13.6 | 29.5 | 0 | 11.1 | bajo | 1 |
| 2018-08-19 | 0 | 0 | 21.4 | 17.4 | 75 | 16.8 | 33.8 | 1 | 4.9 | muy_bajo | 1 |
| 2018-08-20 | 0 | 0 | 21.5 | 14.9 | 59 | 15.3 | 32.4 | 6 | 0.7 | muy_bajo | 1 |
| 2018-08-21 | 0 | 0 | 22.4 | 13.4 | 41 | 14.6 | 33.8 | 0.1 | 4 | muy_bajo | 1 |
| 2018-08-22 | 3 | 85 | 26.3 | 12 | 28 | 23.3 | 50.4 | 0 | 17 | moderado | 1 |
| 2018-08-23 | 126 | 1,218 | 26.3 | 13.6 | 40 | 16.2 | 37.1 | 0 | 14.7 | moderado | 1 |
| 2018-08-24 | 36 | 78 | 19.1 | 15.3 | 82 | 12.3 | 29.2 | 5 | 0.1 | muy_bajo | 1 |
| 2018-08-25 | 0 | 0 | 22.5 | 15.7 | 65 | 11.8 | 21.2 | 0.1 | 1 | muy_bajo | 1 |
| 2018-08-26 | 1 | 1 | 23.6 | 16.7 | 68 | 17.1 | 27 | 5.9 | 0.4 | muy_bajo | 1 |
| 2018-08-27 | 0 | 0 | 20 | 11 | 72 | 19.2 | 46.4 | 14.9 | 0 | muy_bajo | 0 |
It is generated in your browser from this page’s data: one file per fire, aggregated by day and without individual hotspots.
Live widget for your story
It updates itself while the fire is still active and links to this page. Free, with the attribution shown at the bottom.
Sources for this page: NBAC (NRCan), NASA FIRMS (VIIRS), ERA5 (ECMWF/Copernicus C3S) · Open-Meteo.com (CC BY 4.0), GHSL (JRC). Open-Meteo.com · How we build fire pages: methodology
- Burnt area
- 3,050ha
- official perimeter (CWFIS)
- Duration
- 30days
- 28 Jul 2018 – 26 Aug 2018
- Census subdivisions hit
- 1
- municipalities
- Started on
- 28 Jul
- 2018
- Heat detections
- 166
- in a single hotspot: 86 MW
- Danger at start
- 1
- Very low · FWI index
- Average daily power
- 346MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
28 Jul26 Aug
26 Aug 2018
How it evolved, day by day
22 Aug
23 Aug
24 Aug
26 Aug
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
32°high
50km/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: 14.9 mm on 27 Aug.
This area had burned before
No earlier perimeters overlap this fire since 2016, when the satellite record begins.
How big is it?
London boundary: geoBoundaries · Office for National Statistics (Open Government Licence v3.0).
Paris boundary: geoBoundaries · Institut national de l'information géographique et forestière (IGN-F) (Etalab Open License 2.0).
Madrid boundary: geoBoundaries · Open Data ESRI, IGN Central Registry of Cartography Area (CC BY 4.0).
Berlin boundary: geoBoundaries · Federal Agency for Cartography and Geodesy (dl-de/by-2-0).
This compares size, not location: both shapes are at the same scale, north up, centred on each other.
What happened to each census subdivision
-
Rainy River, Unorganized where it started3,042 ha reached on 22 Aug0.2 %
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 2020Built-up area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable 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) |
|---|---|---|---|---|---|
| 28 Jul | 24.5 °C | 45 % | 29 km/h | 6.5 mm | Very low 1 |
| 29 Jul | 25.1 °C | 47 % | 27 km/h | 2.0 mm | Very low 1 |
| 30 Jul | 26.8 °C | 41 % | 24 km/h | 0.1 mm | Very low 5 |
| 31 Jul | 26.4 °C | 39 % | 45 km/h | 6.0 mm | Very low 2 |
| 1 Aug | 15.6 °C | 70 % | 41 km/h | 8.3 mm | Very low 0 |
| 2 Aug | 19.3 °C | 51 % | 21 km/h | 0.0 mm | Very low 0 |
| 3 Aug | 23.0 °C | 50 % | 33 km/h | 0.0 mm | Very low 2 |
| 4 Aug | 23.2 °C | 66 % | 47 km/h | 12.5 mm | Very low 0 |
| 5 Aug | 26.8 °C | 45 % | 49 km/h | 4.1 mm | Very low 1 |
| 6 Aug | 18.7 °C | 67 % | 26 km/h | 0.2 mm | Very low 1 |
| 7 Aug | 25.2 °C | 46 % | 23 km/h | 0.0 mm | Very low 4 |
| 8 Aug | 26.3 °C | 55 % | 36 km/h | 2.1 mm | Very low 1 |
| 9 Aug | 27.7 °C | 40 % | 26 km/h | 0.0 mm | Low 6 |
| 10 Aug | 28.8 °C | 40 % | 38 km/h | 0.2 mm | Low 10 |
| 11 Aug | 31.6 °C | 36 % | 23 km/h | 0.0 mm | Low 11 |
| 12 Aug | 31.1 °C | 39 % | 30 km/h | 0.0 mm | Moderate 13 |
| 13 Aug | 30.1 °C | 48 % | 47 km/h | 0.0 mm | Moderate 16 |
| 14 Aug | 23.6 °C | 47 % | 31 km/h | 0.0 mm | Moderate 12 |
| 15 Aug | 24.6 °C | 46 % | 22 km/h | 0.0 mm | Low 11 |
| 16 Aug | 26.6 °C | 46 % | 25 km/h | 0.0 mm | Moderate 12 |
| 17 Aug | 23.9 °C | 59 % | 28 km/h | 0.1 mm | Low 10 |
| 18 Aug | 24.9 °C | 56 % | 30 km/h | 0.0 mm | Low 11 |
| 19 Aug | 21.4 °C | 75 % | 34 km/h | 1.0 mm | Very low 5 |
| 20 Aug | 21.5 °C | 59 % | 32 km/h | 6.0 mm | Very low 1 |
| 21 Aug | 22.4 °C | 41 % | 34 km/h | 0.1 mm | Very low 4 |
| 22 Aug | 26.3 °C | 28 % | 50 km/h | 0.0 mm | Moderate 17 |
| 23 Aug | 26.3 °C | 40 % | 37 km/h | 0.0 mm | Moderate 15 |
| 24 Aug | 19.1 °C | 82 % | 29 km/h | 5.0 mm | Very low 0 |
| 25 Aug | 22.5 °C | 65 % | 21 km/h | 0.1 mm | Very low 1 |
| 26 Aug | 23.6 °C | 68 % | 27 km/h | 5.9 mm | Very low 0 |
| 27 Aug after | 20.0 °C | 72 % | 46 km/h | 14.9 mm | Very low 0 |
Its twins: fires that started in the same weather
It started with an FWI of 0.6, a minimum humidity of 45% and 1 day without rain. Fires in the area that started in weather like this since 2016: 5.
FWI at the start
0.6
Minimum humidity
45 %
Days without rain
1
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Rainy River, Unorganized fire, July 2018
3,050 ha
30 days
FWI 0.6
Min. humidity 45 %
Kenora, Unorganized fire, May 2021
3,273 ha
6 days
FWI 0.6
Min. humidity 42 %
229 km away, in 2021
First rain (1 mm or more) after it ended: 19.2 mm on 20 May.
Camp Fire, July 2026
1,763 ha
11 days
FWI 4.6
Min. humidity 40 %
61 km away, in 2026
First rain (1 mm or more) after it ended: 5.3 mm on 20 Jul.
Thunder Bay, Unorganized fire, October 2016
3,799 ha
4 days
FWI 5.6
Min. humidity 38 %
166 km away, in 2016
First rain (1 mm or more) after it ended: 16.6 mm on 7 Oct.
Rainy River, Unorganized fire, June 2021
45,785 ha
80 days
FWI 12.9
Min. humidity 50 %
25 km away, in 2021
First rain (1 mm or more) after it ended: 2.3 mm on 28 Aug.
Bear Trap Fire, July 2026
12,466 ha
11 days
FWI 12.5
Min. humidity 40 %
53 km away, in 2026
First rain (1 mm or more) after it ended: 2.2 mm on 20 Jul.
What happened to them
Fires in the area that started in similar weather: 5. With fewer than 15 we give no figures: they would be more noise than signal.
This is a bank of analogues: it shows what usually happens, not what will happen. With fewer than 15 twins we give no figures. How we calculate it
How it ended
14.9 mmfirst rain
27 Augthe day after it ended
50km/h · max. gust
It was considered over on 26 Aug, and on 27 Aug 14.9 mm fell. We do not know whether the rain or the firefighters put it out.
Weather on this page: Open-Meteo.com (CC BY 4.0) · Copernicus Climate Change Service (ERA5)
How a twin is chosen
- Same area: fires that have already ended, less than 250 km from this one, since 2016.
- Same start: we compare the FWI on the first day, the minimum humidity that day and the run of days without rain before it. The slider sets how much they may differ.
- Only pages with final weather data (ERA5 reanalysis) calculated in the same way as this fire’s; agricultural and grass burns and pages with data under review are left out.
- Fires burning at the same time as this one (a week before or after) are left out: they share the same spell of weather and do not count as a precedent.
- They are sorted by similarity, and the outlines of the first five are drawn.
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 21 Jul 2018
After · 2 Sept 2018
Sentinel-2 did not pass over on that day. Try another date, or use false colour, which is daily.
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 · 166Every 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
Frequently asked questions
- How long did the Rainy River, Unorganized fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 28 July 2018 to 26 August 2018 (30 days). The perimeter dates it from 28 July 2018 to 23 August 2018.
- How much area did it burn?
- The official perimeter mapped by Canada’s CWFIS (Natural Resources Canada) is 3,050 hectares (30.5 km²). Other tallies, such as those of provincial agencies, may give slightly different figures.
- Which census subdivisions burned?
- The fire only entered Rainy River, Unorganized (3,042 ha, 0.2 %).
- What was the weather like?
- During the fire the temperature reached 31.6 °C, humidity dropped to 28 % and gusts hit 50 km/h. The fire danger index (FWI) reached 17, class Moderate.
- 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
- CIFFC · Canadian Interagency Forest Fire Centre ↗
- CWFIS · Canadian Wildland Fire Information System ↗
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 With cross-checks and a citable version
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.
Report an error
How we know this
- Perimeter: NBAC (Natural Resources Canada), official.
- Dates adjusted with the VIIRS detections inside the perimeter, which said 28 July 2018 to 23 August 2018. 166 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.
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.