Burned area
satellite only1,688ha
Perimeter published by NBAC (NRCan).
- Source
- NBAC (NRCan)
- Date
- 7 Jun 2023 – 12 Jun 2023
+− cross-check
No official record is matched to this page to compare it with.
CA · Canada · –
Wood Buffalo fire, 7 June 2023 Wood Buffalo
Out · last detection 12 Jun 2023, 20:51 UTC
The fire started on 7 June 2023 in Wood Buffalo, Canada, and satellites saw it burning for 6 days. Canada’s CWFIS (Natural Resources Canada) mapped an official burnt perimeter of 1,688 hectares from satellite imagery, spread across a single census subdivision.
It is the 147th largest in Alberta since 2016 (of 176 with a page). Number 394 in Canada in 2023, of 489.
Use this data
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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 only6days
7 Jun 2023 to 12 Jun 2023: first and last day with fire on the page.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- last detection: 12 Jun 2023, 20:51 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 only7 Jun 2023
First day with fire seen by the satellites or the perimeter.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- 7 Jun 2023
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only195
VIIRS detections at 375 m. Most intense hotspot: 88 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP)
- Date
- 7 Jun 2023 – 12 Jun 2023
+− 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 only594MW
Total radiative power on 10 June 2023; hotspots that day: 42.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 10 Jun 2023
+− 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
model13.2FWI · moderate
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
- 7 Jun 2023, 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
model26.9°C · 31% RH
High of 26.9 °C and minimum humidity of 31% on 10 June 2023; gusts of 45 km/h on 10 June 2023.
- Source
- weather model at the fire’s grid cell
- Date
- 7 Jun 2023 – 12 Jun 2023
- 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
- 1,688 ha
- Dates
- 7 Jun 2023 – 12 Jun 2023
- Name
- Wood Buffalo
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/wood-buffalo-2023-06?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 wood-buffalo-2023-06.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-06-07 | 0 | 0 | 26 | 7.1 | 19 | 17.4 | 42.1 | 0 | 13.2 | moderado | 1 |
| 2023-06-08 | 47 | 83 | 22 | 7.8 | 36 | 11.6 | 26.6 | 0 | 11.2 | moderado | 1 |
| 2023-06-09 | 11 | 55 | 24.5 | 6.2 | 33 | 12.4 | 25.9 | 0 | 13.7 | moderado | 1 |
| 2023-06-10 | 42 | 594 | 26.9 | 10.5 | 31 | 18.4 | 44.6 | 0 | 21.3 | alto | 1 |
| 2023-06-11 | 69 | 140 | 26.2 | 13.2 | 42 | 15 | 33.8 | 0.1 | 14.1 | moderado | 1 |
| 2023-06-12 | 26 | 55 | 22.6 | 11.8 | 30 | 13.8 | 25.9 | 0 | 17.5 | moderado | 1 |
| 2023-06-13 | 0 | 0 | 27 | 11.4 | 30 | 12.5 | 36 | 8.6 | 12 | moderado | 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
- 1,688ha
- official perimeter (CWFIS)
- Duration
- 6days
- 7 Jun 2023 – 12 Jun 2023
- Census subdivisions hit
- 1
- municipalities
- Started on
- 7 Jun
- 2023
- Heat detections
- 195
- in a single hotspot: 88 MW
- Danger at start
- 13
- Moderate · FWI index
- Average daily power
- 185MW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
7 Jun12 Jun
12 Jun 2023
How it evolved, day by day
8 Jun
9 Jun
10 Jun
11 Jun
12 Jun
Fire radiative power detected each day, in megawatts, and number of hotspots. The magenta bar marks the peak day.
The weather it burned in
27°high
45km/h · peak gust
19%lowest humidity
It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 8.6 mm on 13 Jun.
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
-
Wood Buffalo where it started1,617 ha reached on 8 Jun0.0 %
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 2025Built-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 2025, 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. The GHSL 2025 epoch is a projection made from 2020 and earlier data.
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) |
|---|---|---|---|---|---|
| 7 Jun | 26.0 °C | 19 % | 42 km/h | 0.0 mm | Moderate 13 |
| 8 Jun | 22.0 °C | 36 % | 27 km/h | 0.0 mm | Moderate 11 |
| 9 Jun | 24.5 °C | 33 % | 26 km/h | 0.0 mm | Moderate 14 |
| 10 Jun | 26.9 °C | 31 % | 45 km/h | 0.0 mm | High 21 |
| 11 Jun | 26.2 °C | 42 % | 34 km/h | 0.1 mm | Moderate 14 |
| 12 Jun | 22.6 °C | 30 % | 26 km/h | 0.0 mm | Moderate 18 |
| 13 Jun after | 27.0 °C | 30 % | 36 km/h | 8.6 mm | Moderate 12 |
Its twins: fires that started in the same weather
It started with an FWI of 13.2, a minimum humidity of 19% and 1 day without rain. Fires in the area that started in weather like this since 2016: 19.
FWI at the start
13.2
Minimum humidity
19 %
Days without rain
1
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Wood Buffalo fire, 7 June 2023
1,688 ha
6 days
FWI 13.2
Min. humidity 19 %
Wood Buffalo fire, May 2024
14,599 ha
7 days
FWI 10.5
Min. humidity 15 %
76 km away, in 2024
First rain (1 mm or more) after it ended: 18.2 mm on 16 May.
Division No. 18, Unorganized fire, July 2022
9,030 ha
14 days
FWI 16.0
Min. humidity 20 %
245 km away, in 2022
First rain (1 mm or more) after it ended: 6.4 mm on 20 Jul.
Division No. 18, Unorganized fire, August 2022
9,249 ha
6 days
FWI 14.1
Min. humidity 26 %
188 km away, in 2022
First rain (1 mm or more) after it ended: 18.9 mm on 28 Aug.
Wood Buffalo fire, July 2021
27,397 ha
9 days
FWI 18.4
Min. humidity 24 %
188 km away, in 2021
First rain (1 mm or more) after it ended: 6.9 mm on 17 Jul.
Athabasca County fire, May 2023
1,904 ha
21 days
FWI 20.4
Min. humidity 23 %
178 km away, in 2023
First rain (1 mm or more) after it ended: 2.7 mm on 29 May.
What happened to them
- 14 days
- median duration
- 5,398 ha
- median area
- 32 %
- went past 10,000 ha
- 4.1 mm
- rain at the end (median; 19 of 19 had it)
It stayed below its twins: 1,688 ha against a median of 5,398 ha. It lasted 6 days, against 14 days.
All of them had rain in the ten days after the end: the first rainy day brought a median of 4.1 mm.
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
8.6 mmfirst rain
13 Junthe day after it ended
45km/h · max. gust
It was considered over on 12 Jun, and on 13 Jun 8.6 mm fell. We do not know whether the rain or the firefighters put it out. Twins with rain when they ended: 19 of 19, with a median of 4.1 mm.
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 · 31 May 2023
After · 19 Jun 2023
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.
The smoke
CAMS · CopernicusOn 13 June 2023 the air beside the fire reached 188 µg/m³ of PM2.5. That day averaged 96: 6.4 times the WHO daily guideline (15).
PM2.5 peak188 µg/m³
Days over the guideline6 days
PM10268 µg/m³
Optical depth2.70
WHO 15
5 Jun8 Jun11 Jun14 Jun
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 · 195Every 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 Wood Buffalo fire last?
- It burned between 7 June 2023 and 12 June 2023: 6 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 1,688 hectares (16.9 km²). Other tallies, such as those of provincial agencies, may give slightly different figures.
- Which census subdivisions burned?
- The fire only entered Wood Buffalo (1,617 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 26.9 °C, humidity dropped to 19 % and gusts hit 45 km/h. The fire danger index (FWI) reached 21, 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.
- How did the fires that started in similar weather in this area end?
- Fires less than 250 km away that started since 2016 with a similar FWI, humidity and dry spell: 19. Their median duration was 14 days and their median area 5,398 ha; 32 % went past 10,000 ha. All of them had rain in the ten days after the end: the first rainy day brought a median of 4.1 mm.
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 from the perimeter: the VIIRS detections inside it did not change them. 195 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 2025, 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.