Burned area
satellite only1,771ha
Perimeter published by NBAC (NRCan).
- Source
- NBAC (NRCan)
- Date
- 1 Jul 2023 – 1 Jul 2023
+− cross-check
No official record is matched to this page to compare it with.
CA · Canada ·
Kenora, Unorganized fire, 1 July 2023 Kenora, Unorganized
Out · last measured on 1 Jul 2023
The fire started on 1 July 2023 in Kenora, Unorganized, Canada, and satellites saw it burning for 1 day. Canada’s CWFIS (Natural Resources Canada) mapped an official burnt perimeter of 1,771 hectares from satellite imagery, spread across a single census subdivision.
It is the 110th largest in Ontario since 2016 (of 144 with a page). Number 388 in Canada in 2023, of 489.
Use this data
Compare with…
Suggestions: Kenora, Unorganized · 2026Kenora, Unorganized · 2025
Use this data
Fire page data · version 2026-10-27matches 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 only1day
1 Jul 2023 to 1 Jul 2023: first and last day with fire on the page.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- 1 Jul 2023 – 1 Jul 2023
+− 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 only1 Jul 2023
First day with fire seen by the satellites or the perimeter.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- 1 Jul 2023
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Danger at the start
model13.9FWI · 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
- 1 Jul 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
model32.0°C · 32% RH
High of 32.0 °C and minimum humidity of 32% on 1 July 2023; gusts of 25 km/h on 1 July 2023.
- Source
- weather model at the fire’s grid cell
- Date
- 1 Jul 2023 – 1 Jul 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
-
logLast day with fire: 28 June 2023 → 1 July 2023.
-
logStart date: 24 June 2023 → 1 July 2023.
-
logLast day with fire: 1 July 2023 → 28 June 2023.
-
logStart date: 1 July 2023 → 24 June 2023.
-
· reconstructed GHSLPopulation and built-up area computed
Area logged each night
Move the slider to see which area the page published each day.
Versioned permanent link
https://worldfires.org/en/fire/kenora-unorganized-2023-07?v=2026-10-27A 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 kenora-unorganized-2023-07.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-07-01 | 0 | 0 | 32 | 15.3 | 32 | 10.5 | 25.2 | 0 | 13.9 | moderado | 1 |
| 2023-07-02 | 0 | 0 | 33.3 | 15.8 | 30 | 12.8 | 34.2 | 0.2 | 19.4 | moderado | 0 |
| 2023-07-03 | 0 | 0 | 28.5 | 19.9 | 34 | 19.9 | 50.8 | 0.2 | 24.5 | alto | 0 |
| 2023-07-04 | 0 | 0 | 23.6 | 10.8 | 50 | 23.2 | 56.9 | 5 | 4.1 | 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
We have the official CWFIS perimeter for this fire, but the VIIRS sensors did not capture it in enough detail: no day-by-day evolution, but the split by census subdivision is there.
- Burnt area
- 1,771ha
- official perimeter (CWFIS)
- Duration
- 1day
- 1 Jul 2023 – 1 Jul 2023
- Census subdivisions hit
- 1
- municipalities
- Started on
- 1 Jul
- 2023
- Danger at start
- 14
- Moderate · FWI index
Where it burned
The weather it burned in
32°high
25km/h · peak gust
32%lowest humidity
It had gone one day without rain (1 mm or more) when it started. Rain came after the fire: 5.0 mm on 4 Jul.
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
-
Kenora, Unorganized where it started1,834 ha0.0 %
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 area< 0.1 ha
Residents< 20
Inside the perimeter there was no noticeable 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) |
|---|---|---|---|---|---|
| 1 Jul | 32.0 °C | 32 % | 25 km/h | 0.0 mm | Moderate 14 |
| 2 Jul after | 33.3 °C | 30 % | 34 km/h | 0.2 mm | Moderate 19 |
| 3 Jul after | 28.5 °C | 34 % | 51 km/h | 0.2 mm | High 24 |
| 4 Jul after | 23.6 °C | 50 % | 57 km/h | 5.0 mm | Very low 4 |
Before and after, from space
Drag the line to compare the same ground before the fire and after it.
↔
Before · 24 Jun 2023
After · 8 Jul 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 30 June 2023 the air beside the fire reached 83 µg/m³ of PM2.5. That day averaged 38: 2.5 times the WHO daily guideline (15).
PM2.5 peak83 µg/m³
Days over the guideline4 days
PM10118 µg/m³
Optical depth1.82
WHO 15
29 Jun1 Jul3 Jul
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)
Other fires nearby
Frequently asked questions
- How long did the Kenora, Unorganized fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 1 July 2023 to 1 July 2023 (1 day). The perimeter dates it from 1 July 2023 to 26 June 2023.
- How much area did it burn?
- The official perimeter mapped by Canada’s CWFIS (Natural Resources Canada) is 1,771 hectares (17.7 km²). Other tallies, such as those of provincial agencies, may give slightly different figures.
- Which census subdivisions burned?
- The fire only entered Kenora, Unorganized (1,834 ha, 0.0 %).
- What was the weather like?
- During the fire the temperature reached 32.0 °C, humidity dropped to 32 % and gusts hit 25 km/h. The fire danger index (FWI) reached 14, 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 · 4 Changes in area, dates, name, official record or merged pages, compared every night since 24 October 2026.
- Last day with fire: 28 June 2023 → 1 July 2023.
- Start date: 24 June 2023 → 1 July 2023.
- Last day with fire: 1 July 2023 → 28 June 2023.
- Start date: 1 July 2023 → 24 June 2023.
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 1 July 2023 to 26 June 2023. No 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.