Burned area
satellite only28,486ha
Perimeter published by NBAC (NRCan).
- Source
- NBAC (NRCan)
- Date
- 2 May 2023 – 23 Sept 2023
+− cross-check
No official record is matched to this page to compare it with.
CA · Canada · –
Peace River B fire, 2 May 2023 Peace River B
Out · last detection 23 Sept 2023, 20:20 UTC
The fire started on 2 May 2023 in Peace River B, Canada, and satellites saw it burning for 145 days. Canada’s CWFIS (Natural Resources Canada) mapped an official burnt perimeter of 28,486 hectares from satellite imagery, spread across a single census subdivision.
It is the 35th largest in British Columbia since 2016 (of 343 with a page). Number 78 in Canada in 2023, of 489.
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 only145days
2 May 2023 to 23 Sept 2023: first and last day with fire on the page.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- last detection: 23 Sept 2023, 20:20 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 only2 May 2023
First day with fire seen by the satellites or the perimeter.
- Source
- NBAC (NRCan) · NASA FIRMS · VIIRS
- Date
- 2 May 2023
+− cross-check
No official record is matched to this page, so the alert time and the cause are not known here.
Hotspots
satellite only2,968
VIIRS detections at 375 m. Most intense hotspot: 473 MW.
- Source
- NASA FIRMS · VIIRS (Suomi NPP + NOAA-20)
- Date
- 2 May 2023 – 23 Sept 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 only19,311MW
Total radiative power on 14 May 2023; hotspots that day: 329.
- Source
- NASA FIRMS · VIIRS (FRP)
- Date
- 14 May 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
model12.9FWI · moderate
Fire Weather Index (Canadian system) computed by WorldFires for the day the fire started. Consecutive days without rain before: 5.
- Source
- WorldFires calculation (Canadian FWI system)
- Date
- 2 May 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
model31.9°C · 24% RH
High of 31.9 °C and minimum humidity of 24% on 9 July 2023; gusts of 65 km/h on 19 June 2023.
- Source
- weather model at the fire’s grid cell
- Date
- 2 May 2023 – 23 Sept 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.
Living inside
model≈ 40people
Estimated residents inside the perimeter and 2.0 ha of built-up area (100 m grid, epoch 2025).
- Source
- GHSL R2023A · JRC
- Date
- calculated on 24 October 2026
+− cross-check
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.
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
- 28,486 ha
- Dates
- 2 May 2023 – 23 Sept 2023
- Name
- Peace River B
- Official record
- —
Versioned permanent link
https://worldfires.org/en/fire/peace-river-b-2023-05-2?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 peace-river-b-2023-05-2.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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023-05-02 | 3 | 27 | 22.9 | 2.9 | 15 | 11.3 | 27.4 | 0 | 12.9 | moderado | 1 |
| 2023-05-03 | 1 | 1 | 23.8 | 4.9 | 14 | 17.5 | 44.3 | 0 | 18.1 | moderado | 1 |
| 2023-05-04 | 0 | 0 | 23 | 7.1 | 21 | 13 | 26.3 | 0 | 17.1 | moderado | 1 |
| 2023-05-05 | 1 | 2 | 27.4 | 9 | 13 | 24 | 55.4 | 0.1 | 26.9 | alto | 1 |
| 2023-05-06 | 295 | 7,520 | 20 | 10.4 | 21 | 21.6 | 50.8 | 0 | 24 | alto | 1 |
| 2023-05-07 | 80 | 654 | 16.6 | 6.2 | 28 | 15.5 | 31 | 0.3 | 18.1 | moderado | 1 |
| 2023-05-08 | 3 | 3 | 17.7 | 4 | 38 | 9.3 | 23.8 | 0.2 | 13.1 | moderado | 1 |
| 2023-05-09 | 2 | 8 | 20.3 | 2.2 | 23 | 8.9 | 16.2 | 0 | 14.5 | moderado | 1 |
| 2023-05-10 | 8 | 39 | 22.4 | 4.7 | 18 | 8.2 | 27.4 | 0 | 17 | moderado | 1 |
| 2023-05-11 | 5 | 23 | 21.2 | 5.7 | 29 | 16 | 37.4 | 0.6 | 17.2 | moderado | 1 |
| 2023-05-12 | 7 | 13 | 24.6 | 5.6 | 15 | 16.3 | 39.2 | 0 | 24.6 | alto | 1 |
| 2023-05-13 | 0 | 0 | 26.2 | 9.5 | 18 | 16.8 | 40 | 0 | 26.3 | alto | 1 |
| 2023-05-14 | 329 | 19,311 | 29 | 9 | 17 | 9.5 | 22.7 | 0 | 24.1 | alto | 1 |
| 2023-05-15 | 652 | 9,966 | 29 | 10.1 | 20 | 24.5 | 54.7 | 0.1 | 36.5 | alto | 1 |
| 2023-05-16 | 150 | 2,204 | 21.1 | 9.3 | 22 | 10.8 | 25.6 | 0 | 25.2 | alto | 1 |
| 2023-05-17 | 249 | 5,229 | 23 | 5.3 | 23 | 12.8 | 23 | 0 | 26.9 | alto | 1 |
| 2023-05-18 | 247 | 6,449 | 23.5 | 6.1 | 20 | 13.4 | 32.4 | 0 | 28.1 | alto | 1 |
| 2023-05-19 | 171 | 936 | 26.3 | 7.6 | 27 | 16.2 | 33.1 | 0 | 30.2 | alto | 1 |
| 2023-05-20 | 62 | 994 | 25.5 | 6.4 | 20 | 13.5 | 33.5 | 0 | 29 | alto | 1 |
| 2023-05-21 | 287 | 723 | 23.9 | 8.1 | 28 | 10.3 | 32.4 | 0.8 | 19.3 | moderado | 1 |
| 2023-05-22 | 0 | 0 | 13.7 | 7.4 | 84 | 19.9 | 44.6 | 38.6 | 0 | muy_bajo | 1 |
| 2023-05-23 | 0 | 0 | 9.8 | 6.4 | 63 | 15.9 | 34.9 | 5.3 | 0 | muy_bajo | 1 |
| 2023-05-24 | 0 | 0 | 19.1 | 5.1 | 41 | 8 | 22.7 | 0.9 | 0.7 | muy_bajo | 1 |
| 2023-05-25 | 0 | 0 | 20.7 | 8.6 | 35 | 12.1 | 20.2 | 0.4 | 3.9 | muy_bajo | 1 |
| 2023-05-26 | 1 | 1 | 26 | 7.6 | 21 | 14.8 | 34.9 | 0 | 14.7 | moderado | 1 |
| 2023-05-27 | 1 | 1 | 23.5 | 10.1 | 15 | 16.6 | 41 | 0 | 20.9 | moderado | 1 |
| 2023-05-28 | 0 | 0 | 20.4 | 11.2 | 23 | 20.3 | 51.1 | 0 | 23.3 | alto | 1 |
| 2023-05-29 | 0 | 0 | 17.9 | 8.2 | 15 | 20.7 | 51.5 | 0 | 24.4 | alto | 1 |
| 2023-05-30 | 0 | 0 | 17.5 | 3.4 | 20 | 15.6 | 39.2 | 0.3 | 21.9 | alto | 1 |
| 2023-05-31 | 1 | 5 | 16.2 | 4.2 | 21 | 17.9 | 45.7 | 0 | 23.1 | alto | 1 |
| 2023-06-01 | 0 | 0 | 19.2 | 1.4 | 15 | 13.3 | 29.9 | 0 | 21.5 | alto | 1 |
| 2023-06-02 | 2 | 10 | 22.5 | 4.5 | 23 | 14.5 | 40.3 | 0 | 23 | alto | 1 |
| 2023-06-03 | 0 | 0 | 24.7 | 12.1 | 25 | 11.6 | 28.1 | 3.5 | 4.5 | muy_bajo | 1 |
| 2023-06-04 | 1 | 1 | 18.1 | 8.7 | 20 | 22.9 | 53.3 | 4 | 4.6 | muy_bajo | 1 |
| 2023-06-05 | 0 | 0 | 17.6 | 3.2 | 19 | 18.1 | 42.5 | 0 | 12.3 | moderado | 1 |
| 2023-06-06 | 0 | 0 | 20.3 | 5.3 | 19 | 20.5 | 50.8 | 0 | 21.1 | moderado | 1 |
| 2023-06-07 | 9 | 25 | 24.4 | 7.4 | 19 | 12.4 | 27 | 0 | 20.4 | moderado | 1 |
| 2023-06-08 | 19 | 154 | 26.8 | 8.2 | 25 | 15.1 | 36.7 | 0 | 22.8 | alto | 1 |
| 2023-06-09 | 17 | 34 | 26.6 | 11.7 | 37 | 13 | 35.3 | 0 | 20.1 | moderado | 1 |
| 2023-06-10 | 0 | 0 | 20.4 | 15.4 | 54 | 8.8 | 27.4 | 1.7 | 4.1 | muy_bajo | 1 |
| 2023-06-11 | 0 | 0 | 26.4 | 11.7 | 19 | 13.5 | 27 | 0 | 18.9 | moderado | 1 |
| 2023-06-12 | 0 | 0 | 23.5 | 9.5 | 32 | 18.7 | 40.7 | 0.2 | 22.3 | alto | 1 |
| 2023-06-13 | 0 | 0 | 16.7 | 10.7 | 53 | 13.4 | 36 | 3.7 | 2.6 | muy_bajo | 1 |
| 2023-06-14 | 0 | 0 | 16.7 | 8.8 | 46 | 17.4 | 40.7 | 1.2 | 4.7 | muy_bajo | 1 |
| 2023-06-15 | 0 | 0 | 21 | 4.2 | 27 | 15.1 | 28.1 | 0.4 | 12.7 | moderado | 1 |
| 2023-06-16 | 0 | 0 | 19 | 11.2 | 33 | 23 | 53.6 | 3.2 | 5.7 | bajo | 1 |
| 2023-06-17 | 0 | 0 | 16.7 | 7.2 | 21 | 15.9 | 38.9 | 0.4 | 12.5 | moderado | 1 |
| 2023-06-18 | 0 | 0 | 14.2 | 3.9 | 47 | 17.1 | 38.5 | 3 | 3.2 | muy_bajo | 1 |
| 2023-06-19 | 1 | 2 | 18 | 9.3 | 26 | 28.6 | 65.2 | 0 | 14.5 | moderado | 1 |
| 2023-06-20 | 0 | 0 | 20.8 | 3.3 | 25 | 9.5 | 28.4 | 0.7 | 12.2 | moderado | 1 |
| 2023-06-21 | 1 | 10 | 24.4 | 7.5 | 23 | 9.5 | 22.7 | 0 | 17.7 | moderado | 1 |
| 2023-06-22 | 0 | 0 | 22.5 | 10.1 | 42 | 7.9 | 25.9 | 1.8 | 4.9 | muy_bajo | 1 |
| 2023-06-23 | 0 | 0 | 27.5 | 10.5 | 26 | 8.9 | 25.2 | 0.3 | 15.3 | moderado | 1 |
| 2023-06-24 | 0 | 0 | 25.7 | 12.4 | 35 | 14.6 | 35.3 | 3.9 | 4.5 | muy_bajo | 1 |
| 2023-06-25 | 0 | 0 | 23 | 11.7 | 50 | 12.2 | 23.4 | 1.2 | 5.2 | bajo | 1 |
| 2023-06-26 | 0 | 0 | 26.3 | 11.9 | 32 | 8.2 | 19.4 | 0 | 12.3 | moderado | 1 |
| 2023-06-27 | 0 | 0 | 27.1 | 14.7 | 30 | 6.3 | 22.3 | 0.9 | 12.4 | moderado | 1 |
| 2023-06-28 | 0 | 0 | 28.2 | 12.4 | 30 | 11.2 | 32.8 | 1.4 | 12.7 | moderado | 1 |
| 2023-06-29 | 0 | 0 | 24.5 | 15.9 | 23 | 19.3 | 50.4 | 0 | 25.5 | alto | 1 |
| 2023-06-30 | 0 | 0 | 22.5 | 12.9 | 19 | 20.6 | 55.1 | 0 | 30 | alto | 1 |
| 2023-07-01 | 0 | 0 | 18.9 | 9.6 | 34 | 17.4 | 42.5 | 2.6 | 6.3 | bajo | 1 |
| 2023-07-02 | 0 | 0 | 18.6 | 9.3 | 37 | 19.5 | 46.4 | 2.7 | 5.2 | bajo | 1 |
| 2023-07-03 | 0 | 0 | 19.4 | 10.8 | 49 | 15.5 | 40 | 2.3 | 3.9 | muy_bajo | 1 |
| 2023-07-04 | 0 | 0 | 26.3 | 6.6 | 25 | 9.7 | 25.6 | 0 | 12.3 | moderado | 1 |
| 2023-07-05 | 0 | 0 | 26.3 | 10.2 | 32 | 7.5 | 24.8 | 2 | 6.2 | bajo | 1 |
| 2023-07-06 | 0 | 0 | 23.2 | 11.5 | 47 | 9.7 | 22.7 | 6.6 | 1 | muy_bajo | 1 |
| 2023-07-07 | 0 | 0 | 25.8 | 11.9 | 30 | 9.6 | 23.8 | 1.8 | 3.7 | muy_bajo | 1 |
| 2023-07-08 | 0 | 0 | 30.3 | 10.4 | 27 | 12.2 | 24.1 | 0 | 15.7 | moderado | 1 |
| 2023-07-09 | 0 | 0 | 31.9 | 14 | 24 | 11.4 | 26.6 | 1.4 | 15.8 | moderado | 1 |
| 2023-07-10 | 0 | 0 | 25.9 | 15.4 | 41 | 11.2 | 20.5 | 4.9 | 2.5 | muy_bajo | 1 |
| 2023-07-11 | 0 | 0 | 25.4 | 12.8 | 41 | 10.5 | 28.1 | 1.6 | 4 | muy_bajo | 1 |
| 2023-07-12 | 0 | 0 | 25.7 | 10.8 | 35 | 11.3 | 24.5 | 0.1 | 11.2 | moderado | 1 |
| 2023-07-13 | 0 | 0 | 21.4 | 13.3 | 56 | 9.6 | 29.2 | 4.4 | 0.9 | muy_bajo | 1 |
| 2023-07-14 | 0 | 0 | 24.1 | 11.4 | 45 | 7 | 18.7 | 0.3 | 3.4 | muy_bajo | 1 |
| 2023-07-15 | 0 | 0 | 22.9 | 11.7 | 49 | 7.6 | 19.8 | 7.1 | 0.5 | muy_bajo | 1 |
| 2023-07-16 | 0 | 0 | 24.8 | 10.8 | 35 | 8.9 | 27.7 | 0.8 | 3 | muy_bajo | 1 |
| 2023-07-17 | 0 | 0 | 21.2 | 11 | 45 | 9.2 | 25.9 | 6.5 | 0.5 | muy_bajo | 1 |
| 2023-07-18 | 0 | 0 | 19.3 | 10 | 57 | 10.3 | 29.5 | 2 | 0.7 | muy_bajo | 1 |
| 2023-07-19 | 0 | 0 | 23.7 | 9.4 | 43 | 8.9 | 20.2 | 0.2 | 2.8 | muy_bajo | 1 |
| 2023-07-20 | 0 | 0 | 27.4 | 10.5 | 30 | 10.1 | 15.5 | 0 | 9.9 | bajo | 1 |
| 2023-07-21 | 0 | 0 | 27.4 | 12.2 | 31 | 10 | 25.9 | 0.2 | 12.8 | moderado | 1 |
| 2023-07-22 | 0 | 0 | 24.5 | 11.9 | 36 | 13 | 24.5 | 1.7 | 6.2 | bajo | 1 |
| 2023-07-23 | 0 | 0 | 23.3 | 8.8 | 22 | 14.2 | 37.8 | 0 | 15.3 | moderado | 1 |
| 2023-07-24 | 0 | 0 | 17.3 | 11.3 | 56 | 6 | 19.4 | 1.6 | 2.4 | muy_bajo | 1 |
| 2023-07-25 | 0 | 0 | 18.1 | 9.1 | 56 | 11.8 | 32.8 | 6.6 | 0.4 | muy_bajo | 1 |
| 2023-07-26 | 0 | 0 | 15.6 | 11.4 | 81 | 13.3 | 32 | 19.2 | 0 | muy_bajo | 1 |
| 2023-07-27 | 0 | 0 | 19.8 | 11.4 | 45 | 13.4 | 31.3 | 1.8 | 0.3 | muy_bajo | 1 |
| 2023-07-28 | 0 | 0 | 21.2 | 8.5 | 37 | 10 | 28.1 | 0 | 1.4 | muy_bajo | 1 |
| 2023-07-29 | 0 | 0 | 24.2 | 7.3 | 31 | 9.8 | 26.6 | 0 | 6.7 | bajo | 1 |
| 2023-07-30 | 0 | 0 | 24.7 | 9.2 | 31 | 8.9 | 25.2 | 0.2 | 9.8 | bajo | 1 |
| 2023-07-31 | 0 | 0 | 16.4 | 12 | 70 | 8.6 | 21.2 | 9.1 | 0 | muy_bajo | 1 |
| 2023-08-01 | 0 | 0 | 19 | 10.7 | 54 | 7.6 | 20.5 | 7.3 | 0 | muy_bajo | 1 |
| 2023-08-02 | 0 | 0 | 19.3 | 7.8 | 55 | 5.9 | 22 | 0.5 | 0.4 | muy_bajo | 1 |
| 2023-08-03 | 0 | 0 | 20.2 | 9.5 | 50 | 10.1 | 26.6 | 4.8 | 0.3 | muy_bajo | 1 |
| 2023-08-04 | 0 | 0 | 23.6 | 8.4 | 37 | 7.9 | 25.2 | 0.1 | 1 | muy_bajo | 1 |
| 2023-08-05 | 0 | 0 | 26.3 | 8.8 | 32 | 10.5 | 23 | 0 | 6.7 | bajo | 1 |
| 2023-08-06 | 0 | 0 | 27.2 | 10.4 | 31 | 9 | 17.3 | 0.1 | 9.6 | bajo | 1 |
| 2023-08-07 | 0 | 0 | 26.9 | 11.5 | 35 | 12 | 29.9 | 0.8 | 9.4 | bajo | 1 |
| 2023-08-08 | 0 | 0 | 20.1 | 13.6 | 52 | 13.7 | 33.5 | 0.6 | 7.7 | bajo | 1 |
| 2023-08-09 | 0 | 0 | 22.5 | 12.3 | 41 | 9.4 | 24.8 | 0 | 8.5 | bajo | 1 |
| 2023-08-10 | 0 | 0 | 21.1 | 11.8 | 44 | 12.4 | 37.8 | 2.1 | 2.8 | muy_bajo | 1 |
| 2023-08-11 | 0 | 0 | 21.1 | 10.3 | 36 | 12.9 | 33.8 | 0.1 | 7.8 | bajo | 1 |
| 2023-08-12 | 0 | 0 | 23.4 | 9.7 | 29 | 18.9 | 45.4 | 0 | 15.6 | moderado | 1 |
| 2023-08-13 | 1 | 1 | 27.5 | 14.3 | 31 | 25.2 | 60.1 | 0 | 21.9 | alto | 1 |
| 2023-08-14 | 1 | 1 | 25.1 | 13.3 | 17 | 13.5 | 36.4 | 0 | 21 | moderado | 1 |
| 2023-08-15 | 0 | 0 | 24.5 | 12.8 | 23 | 22.7 | 54.7 | 1 | 21.1 | moderado | 1 |
| 2023-08-16 | 0 | 0 | 26.7 | 8.7 | 29 | 18.9 | 44.3 | 0 | 21.7 | alto | 1 |
| 2023-08-17 | 0 | 0 | 23.7 | 12.8 | 20 | 16.9 | 43.2 | 0 | 24.1 | alto | 1 |
| 2023-08-18 | 0 | 0 | 13.8 | 7 | 42 | 15.5 | 43.6 | 0.6 | 16.4 | moderado | 1 |
| 2023-08-19 | 0 | 0 | 22.5 | 4 | 26 | 10.1 | 26.6 | 0 | 17.6 | moderado | 1 |
| 2023-08-20 | 0 | 0 | 23.9 | 6.5 | 22 | 12.1 | 25.6 | 0 | 21.9 | alto | 1 |
| 2023-08-21 | 6 | 22 | 23.1 | 5.8 | 25 | 12 | 31 | 0 | 22.5 | alto | 1 |
| 2023-08-22 | 0 | 0 | 21.5 | 6.7 | 46 | 8.3 | 20.5 | 0.7 | 12.5 | moderado | 1 |
| 2023-08-23 | 0 | 0 | 20.6 | 9.7 | 41 | 14.5 | 36.7 | 0 | 16.3 | moderado | 1 |
| 2023-08-24 | 0 | 0 | 22.7 | 6.6 | 36 | 12.4 | 20.5 | 0 | 17.7 | moderado | 1 |
| 2023-08-25 | 0 | 0 | 27 | 8.5 | 21 | 12.4 | 29.5 | 0 | 25.4 | alto | 1 |
| 2023-08-26 | 0 | 0 | 28.1 | 10.6 | 29 | 13.5 | 24.8 | 0 | 26.9 | alto | 1 |
| 2023-08-27 | 0 | 0 | 29.2 | 10.8 | 25 | 12.8 | 32 | 0 | 27.3 | alto | 1 |
| 2023-08-28 | 1 | 1 | 30.6 | 12.9 | 23 | 12 | 31 | 0 | 28.9 | alto | 1 |
| 2023-08-29 | 0 | 0 | 27.9 | 10.6 | 25 | 8.7 | 22 | 0 | 27.2 | alto | 1 |
| 2023-08-30 | 0 | 0 | 23.9 | 10 | 42 | 13.8 | 30.2 | 1.2 | 14.4 | moderado | 1 |
| 2023-08-31 | 0 | 0 | 21.6 | 11.7 | 40 | 11.8 | 24.8 | 1.6 | 8.5 | bajo | 1 |
| 2023-09-01 | 1 | 2 | 26.3 | 7.2 | 25 | 24.7 | 56.5 | 0 | 32 | alto | 1 |
| 2023-09-02 | 3 | 5 | 21.7 | 11.4 | 19 | 18 | 41.8 | 0 | 32.1 | alto | 1 |
| 2023-09-03 | 3 | 3 | 14.3 | 4.3 | 40 | 12.9 | 29.9 | 4.5 | 3.3 | muy_bajo | 1 |
| 2023-09-04 | 0 | 0 | 15.3 | 1.5 | 36 | 12.1 | 24.5 | 0 | 6.5 | bajo | 1 |
| 2023-09-05 | 0 | 0 | 13 | 4.9 | 54 | 11.2 | 29.5 | 1.1 | 5.4 | bajo | 1 |
| 2023-09-06 | 0 | 0 | 16.5 | 2.5 | 39 | 9.1 | 23.8 | 0.1 | 9.2 | bajo | 1 |
| 2023-09-07 | 0 | 0 | 18.5 | 4 | 29 | 15.8 | 35.3 | 0 | 18.7 | moderado | 1 |
| 2023-09-08 | 1 | 6 | 19.8 | 2.7 | 26 | 9.8 | 21.2 | 0 | 19.5 | moderado | 1 |
| 2023-09-09 | 2 | 12 | 21.4 | 1.7 | 29 | 13.5 | 27 | 0 | 22.4 | alto | 1 |
| 2023-09-10 | 0 | 0 | 23.9 | 3.6 | 29 | 15.1 | 28.4 | 0 | 24.7 | alto | 1 |
| 2023-09-11 | 0 | 0 | 20 | 9.3 | 28 | 19.1 | 48.2 | 0 | 27.8 | alto | 1 |
| 2023-09-12 | 0 | 0 | 19.9 | 7.6 | 41 | 17.7 | 42.5 | 0.2 | 24.8 | alto | 1 |
| 2023-09-13 | 0 | 0 | 17.2 | 7.8 | 27 | 20.9 | 56.9 | 0 | 27.6 | alto | 1 |
| 2023-09-14 | 0 | 0 | 20.3 | 1.9 | 21 | 14.1 | 35.3 | 0 | 26.8 | alto | 1 |
| 2023-09-15 | 5 | 132 | 25.3 | 5.5 | 11 | 28.8 | 64.4 | 0 | 51.3 | extremo | 1 |
| 2023-09-16 | 136 | 1,616 | 19.7 | 6.1 | 22 | 12.5 | 32 | 0 | 32.3 | alto | 1 |
| 2023-09-17 | 107 | 333 | 18.8 | 6.6 | 32 | 24.8 | 57.2 | 0 | 36.8 | alto | 1 |
| 2023-09-18 | 12 | 40 | 15.8 | 7.2 | 32 | 23.5 | 55.1 | 0 | 33.2 | alto | 1 |
| 2023-09-19 | 18 | 26 | 12.9 | 4.9 | 41 | 14.8 | 36 | 0 | 23.1 | alto | 1 |
| 2023-09-20 | 0 | 0 | 16.9 | 4 | 28 | 14.3 | 28.1 | 0 | 23.9 | alto | 1 |
| 2023-09-21 | 0 | 0 | 20.4 | 6.4 | 34 | 19.4 | 47.2 | 0 | 27.6 | alto | 1 |
| 2023-09-22 | 15 | 69 | 24.1 | 7.4 | 11 | 17 | 37.4 | 0 | 38.8 | muy_alto | 1 |
| 2023-09-23 | 51 | 147 | 18.1 | 3.5 | 29 | 13.4 | 31 | 0 | 30.7 | alto | 1 |
| 2023-09-24 | 0 | 0 | 13.8 | 2.9 | 47 | 14.9 | 43.9 | 0.9 | 14.8 | moderado | 0 |
| 2023-09-25 | 0 | 0 | 11.3 | -0.3 | 55 | 11.6 | 31.3 | 4.2 | 1.7 | muy_bajo | 0 |
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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
- 28,486ha
- official perimeter (CWFIS)
- Duration
- 145days
- 2 May 2023 – 23 Sept 2023
- Census subdivisions hit
- 1
- municipalities
- Started on
- 2 May
- 2023
- Heat detections
- 2,968
- in a single hotspot: 473 MW
- Danger at start
- 13
- Moderate · FWI index
- Average daily power
- 1.3GW
- detected power per day, on average
Where it burned
HOTSPOTS BY DAY
2 May23 Sept
23 Sept 2023
How it evolved, day by day
2 May
14 May
26 May
21 Jun
9 Sept
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
65km/h · peak gust
11%lowest humidity
It had gone 5 days without rain (1 mm or more) when it started. Rain came after the fire: 4.2 mm on 25 Sept.
This area had burned before
19% of the perimeter overlaps earlier fires recorded since 2016: 5,299 ha in 2016.
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
-
Peace River B where it started28,310 ha reached on 2 May0.3 %
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 area2.0 ha
Residents≈ 40
Inside the perimeter there were about 2.0 hectares of built-up land and about 40 residents (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) |
|---|---|---|---|---|---|
| 2 May | 22.9 °C | 15 % | 27 km/h | 0.0 mm | Moderate 13 |
| 3 May | 23.8 °C | 14 % | 44 km/h | 0.0 mm | Moderate 18 |
| 4 May | 23.0 °C | 21 % | 26 km/h | 0.0 mm | Moderate 17 |
| 5 May | 27.4 °C | 13 % | 55 km/h | 0.1 mm | High 27 |
| 6 May | 20.0 °C | 21 % | 51 km/h | 0.0 mm | High 24 |
| 7 May | 16.6 °C | 28 % | 31 km/h | 0.3 mm | Moderate 18 |
| 8 May | 17.7 °C | 38 % | 24 km/h | 0.2 mm | Moderate 13 |
| 9 May | 20.3 °C | 23 % | 16 km/h | 0.0 mm | Moderate 14 |
| 10 May | 22.4 °C | 18 % | 27 km/h | 0.0 mm | Moderate 17 |
| 11 May | 21.2 °C | 29 % | 37 km/h | 0.6 mm | Moderate 17 |
| 12 May | 24.6 °C | 15 % | 39 km/h | 0.0 mm | High 25 |
| 13 May | 26.2 °C | 18 % | 40 km/h | 0.0 mm | High 26 |
| 14 May | 29.0 °C | 17 % | 23 km/h | 0.0 mm | High 24 |
| 15 May | 29.0 °C | 20 % | 55 km/h | 0.1 mm | High 36 |
| 16 May | 21.1 °C | 22 % | 26 km/h | 0.0 mm | High 25 |
| 17 May | 23.0 °C | 23 % | 23 km/h | 0.0 mm | High 27 |
| 18 May | 23.5 °C | 20 % | 32 km/h | 0.0 mm | High 28 |
| 19 May | 26.3 °C | 27 % | 33 km/h | 0.0 mm | High 30 |
| 20 May | 25.5 °C | 20 % | 34 km/h | 0.0 mm | High 29 |
| 21 May | 23.9 °C | 28 % | 32 km/h | 0.8 mm | Moderate 19 |
| 22 May | 13.7 °C | 84 % | 45 km/h | 38.6 mm | Very low 0 |
| 23 May | 9.8 °C | 63 % | 35 km/h | 5.3 mm | Very low 0 |
| 24 May | 19.1 °C | 41 % | 23 km/h | 0.9 mm | Very low 1 |
| 25 May | 20.7 °C | 35 % | 20 km/h | 0.4 mm | Very low 4 |
| 26 May | 26.0 °C | 21 % | 35 km/h | 0.0 mm | Moderate 15 |
| 27 May | 23.5 °C | 15 % | 41 km/h | 0.0 mm | Moderate 21 |
| 28 May | 20.4 °C | 23 % | 51 km/h | 0.0 mm | High 23 |
| 29 May | 17.9 °C | 15 % | 52 km/h | 0.0 mm | High 24 |
| 30 May | 17.5 °C | 20 % | 39 km/h | 0.3 mm | High 22 |
| 31 May | 16.2 °C | 21 % | 46 km/h | 0.0 mm | High 23 |
| 1 Jun | 19.2 °C | 15 % | 30 km/h | 0.0 mm | High 22 |
| 2 Jun | 22.5 °C | 23 % | 40 km/h | 0.0 mm | High 23 |
| 3 Jun | 24.7 °C | 25 % | 28 km/h | 3.5 mm | Very low 4 |
| 4 Jun | 18.1 °C | 20 % | 53 km/h | 4.0 mm | Very low 5 |
| 5 Jun | 17.6 °C | 19 % | 42 km/h | 0.0 mm | Moderate 12 |
| 6 Jun | 20.3 °C | 19 % | 51 km/h | 0.0 mm | Moderate 21 |
| 7 Jun | 24.4 °C | 19 % | 27 km/h | 0.0 mm | Moderate 20 |
| 8 Jun | 26.8 °C | 25 % | 37 km/h | 0.0 mm | High 23 |
| 9 Jun | 26.6 °C | 37 % | 35 km/h | 0.0 mm | Moderate 20 |
| 10 Jun | 20.4 °C | 54 % | 27 km/h | 1.7 mm | Very low 4 |
| 11 Jun | 26.4 °C | 19 % | 27 km/h | 0.0 mm | Moderate 19 |
| 12 Jun | 23.5 °C | 32 % | 41 km/h | 0.2 mm | High 22 |
| 13 Jun | 16.7 °C | 53 % | 36 km/h | 3.7 mm | Very low 3 |
| 14 Jun | 16.7 °C | 46 % | 41 km/h | 1.2 mm | Very low 5 |
| 15 Jun | 21.0 °C | 27 % | 28 km/h | 0.4 mm | Moderate 13 |
| 16 Jun | 19.0 °C | 33 % | 54 km/h | 3.2 mm | Low 6 |
| 17 Jun | 16.7 °C | 21 % | 39 km/h | 0.4 mm | Moderate 12 |
| 18 Jun | 14.2 °C | 47 % | 38 km/h | 3.0 mm | Very low 3 |
| 19 Jun | 18.0 °C | 26 % | 65 km/h | 0.0 mm | Moderate 14 |
| 20 Jun | 20.8 °C | 25 % | 28 km/h | 0.7 mm | Moderate 12 |
| 21 Jun | 24.4 °C | 23 % | 23 km/h | 0.0 mm | Moderate 18 |
| 22 Jun | 22.5 °C | 42 % | 26 km/h | 1.8 mm | Very low 5 |
| 23 Jun | 27.5 °C | 26 % | 25 km/h | 0.3 mm | Moderate 15 |
| 24 Jun | 25.7 °C | 35 % | 35 km/h | 3.9 mm | Very low 4 |
| 25 Jun | 23.0 °C | 50 % | 23 km/h | 1.2 mm | Low 5 |
| 26 Jun | 26.3 °C | 32 % | 19 km/h | 0.0 mm | Moderate 12 |
| 27 Jun | 27.1 °C | 30 % | 22 km/h | 0.9 mm | Moderate 12 |
| 28 Jun | 28.2 °C | 30 % | 33 km/h | 1.4 mm | Moderate 13 |
| 29 Jun | 24.5 °C | 23 % | 50 km/h | 0.0 mm | High 26 |
| 30 Jun | 22.5 °C | 19 % | 55 km/h | 0.0 mm | High 30 |
| 1 Jul | 18.9 °C | 34 % | 42 km/h | 2.6 mm | Low 6 |
| 2 Jul | 18.6 °C | 37 % | 46 km/h | 2.7 mm | Low 5 |
| 3 Jul | 19.4 °C | 49 % | 40 km/h | 2.3 mm | Very low 4 |
| 4 Jul | 26.3 °C | 25 % | 26 km/h | 0.0 mm | Moderate 12 |
| 5 Jul | 26.3 °C | 32 % | 25 km/h | 2.0 mm | Low 6 |
| 6 Jul | 23.2 °C | 47 % | 23 km/h | 6.6 mm | Very low 1 |
| 7 Jul | 25.8 °C | 30 % | 24 km/h | 1.8 mm | Very low 4 |
| 8 Jul | 30.3 °C | 27 % | 24 km/h | 0.0 mm | Moderate 16 |
| 9 Jul | 31.9 °C | 24 % | 27 km/h | 1.4 mm | Moderate 16 |
| 10 Jul | 25.9 °C | 41 % | 20 km/h | 4.9 mm | Very low 2 |
| 11 Jul | 25.4 °C | 41 % | 28 km/h | 1.6 mm | Very low 4 |
| 12 Jul | 25.7 °C | 35 % | 24 km/h | 0.1 mm | Moderate 11 |
| 13 Jul | 21.4 °C | 56 % | 29 km/h | 4.4 mm | Very low 1 |
| 14 Jul | 24.1 °C | 45 % | 19 km/h | 0.3 mm | Very low 3 |
| 15 Jul | 22.9 °C | 49 % | 20 km/h | 7.1 mm | Very low 0 |
| 16 Jul | 24.8 °C | 35 % | 28 km/h | 0.8 mm | Very low 3 |
| 17 Jul | 21.2 °C | 45 % | 26 km/h | 6.5 mm | Very low 0 |
| 18 Jul | 19.3 °C | 57 % | 30 km/h | 2.0 mm | Very low 1 |
| 19 Jul | 23.7 °C | 43 % | 20 km/h | 0.2 mm | Very low 3 |
| 20 Jul | 27.4 °C | 30 % | 16 km/h | 0.0 mm | Low 10 |
| 21 Jul | 27.4 °C | 31 % | 26 km/h | 0.2 mm | Moderate 13 |
| 22 Jul | 24.5 °C | 36 % | 24 km/h | 1.7 mm | Low 6 |
| 23 Jul | 23.3 °C | 22 % | 38 km/h | 0.0 mm | Moderate 15 |
| 24 Jul | 17.3 °C | 56 % | 19 km/h | 1.6 mm | Very low 2 |
| 25 Jul | 18.1 °C | 56 % | 33 km/h | 6.6 mm | Very low 0 |
| 26 Jul | 15.6 °C | 81 % | 32 km/h | 19.2 mm | Very low 0 |
| 27 Jul | 19.8 °C | 45 % | 31 km/h | 1.8 mm | Very low 0 |
| 28 Jul | 21.2 °C | 37 % | 28 km/h | 0.0 mm | Very low 1 |
| 29 Jul | 24.2 °C | 31 % | 27 km/h | 0.0 mm | Low 7 |
| 30 Jul | 24.7 °C | 31 % | 25 km/h | 0.2 mm | Low 10 |
| 31 Jul | 16.4 °C | 70 % | 21 km/h | 9.1 mm | Very low 0 |
| 1 Aug | 19.0 °C | 54 % | 20 km/h | 7.3 mm | Very low 0 |
| 2 Aug | 19.3 °C | 55 % | 22 km/h | 0.5 mm | Very low 0 |
| 3 Aug | 20.2 °C | 50 % | 27 km/h | 4.8 mm | Very low 0 |
| 4 Aug | 23.6 °C | 37 % | 25 km/h | 0.1 mm | Very low 1 |
| 5 Aug | 26.3 °C | 32 % | 23 km/h | 0.0 mm | Low 7 |
| 6 Aug | 27.2 °C | 31 % | 17 km/h | 0.1 mm | Low 10 |
| 7 Aug | 26.9 °C | 35 % | 30 km/h | 0.8 mm | Low 9 |
| 8 Aug | 20.1 °C | 52 % | 34 km/h | 0.6 mm | Low 8 |
| 9 Aug | 22.5 °C | 41 % | 25 km/h | 0.0 mm | Low 8 |
| 10 Aug | 21.1 °C | 44 % | 38 km/h | 2.1 mm | Very low 3 |
| 11 Aug | 21.1 °C | 36 % | 34 km/h | 0.1 mm | Low 8 |
| 12 Aug | 23.4 °C | 29 % | 45 km/h | 0.0 mm | Moderate 16 |
| 13 Aug | 27.5 °C | 31 % | 60 km/h | 0.0 mm | High 22 |
| 14 Aug | 25.1 °C | 17 % | 36 km/h | 0.0 mm | Moderate 21 |
| 15 Aug | 24.5 °C | 23 % | 55 km/h | 1.0 mm | Moderate 21 |
| 16 Aug | 26.7 °C | 29 % | 44 km/h | 0.0 mm | High 22 |
| 17 Aug | 23.7 °C | 20 % | 43 km/h | 0.0 mm | High 24 |
| 18 Aug | 13.8 °C | 42 % | 44 km/h | 0.6 mm | Moderate 16 |
| 19 Aug | 22.5 °C | 26 % | 27 km/h | 0.0 mm | Moderate 18 |
| 20 Aug | 23.9 °C | 22 % | 26 km/h | 0.0 mm | High 22 |
| 21 Aug | 23.1 °C | 25 % | 31 km/h | 0.0 mm | High 22 |
| 22 Aug | 21.5 °C | 46 % | 20 km/h | 0.7 mm | Moderate 12 |
| 23 Aug | 20.6 °C | 41 % | 37 km/h | 0.0 mm | Moderate 16 |
| 24 Aug | 22.7 °C | 36 % | 20 km/h | 0.0 mm | Moderate 18 |
| 25 Aug | 27.0 °C | 21 % | 30 km/h | 0.0 mm | High 25 |
| 26 Aug | 28.1 °C | 29 % | 25 km/h | 0.0 mm | High 27 |
| 27 Aug | 29.2 °C | 25 % | 32 km/h | 0.0 mm | High 27 |
| 28 Aug | 30.6 °C | 23 % | 31 km/h | 0.0 mm | High 29 |
| 29 Aug | 27.9 °C | 25 % | 22 km/h | 0.0 mm | High 27 |
| 30 Aug | 23.9 °C | 42 % | 30 km/h | 1.2 mm | Moderate 14 |
| 31 Aug | 21.6 °C | 40 % | 25 km/h | 1.6 mm | Low 8 |
| 1 Sept | 26.3 °C | 25 % | 56 km/h | 0.0 mm | High 32 |
| 2 Sept | 21.7 °C | 19 % | 42 km/h | 0.0 mm | High 32 |
| 3 Sept | 14.3 °C | 40 % | 30 km/h | 4.5 mm | Very low 3 |
| 4 Sept | 15.3 °C | 36 % | 24 km/h | 0.0 mm | Low 6 |
| 5 Sept | 13.0 °C | 54 % | 30 km/h | 1.1 mm | Low 5 |
| 6 Sept | 16.5 °C | 39 % | 24 km/h | 0.1 mm | Low 9 |
| 7 Sept | 18.5 °C | 29 % | 35 km/h | 0.0 mm | Moderate 19 |
| 8 Sept | 19.8 °C | 26 % | 21 km/h | 0.0 mm | Moderate 20 |
| 9 Sept | 21.4 °C | 29 % | 27 km/h | 0.0 mm | High 22 |
| 10 Sept | 23.9 °C | 29 % | 28 km/h | 0.0 mm | High 25 |
| 11 Sept | 20.0 °C | 28 % | 48 km/h | 0.0 mm | High 28 |
| 12 Sept | 19.9 °C | 41 % | 42 km/h | 0.2 mm | High 25 |
| 13 Sept | 17.2 °C | 27 % | 57 km/h | 0.0 mm | High 28 |
| 14 Sept | 20.3 °C | 21 % | 35 km/h | 0.0 mm | High 27 |
| 15 Sept | 25.3 °C | 11 % | 64 km/h | 0.0 mm | Extreme 51 |
| 16 Sept | 19.7 °C | 22 % | 32 km/h | 0.0 mm | High 32 |
| 17 Sept | 18.8 °C | 32 % | 57 km/h | 0.0 mm | High 37 |
| 18 Sept | 15.8 °C | 32 % | 55 km/h | 0.0 mm | High 33 |
| 19 Sept | 12.9 °C | 41 % | 36 km/h | 0.0 mm | High 23 |
| 20 Sept | 16.9 °C | 28 % | 28 km/h | 0.0 mm | High 24 |
| 21 Sept | 20.4 °C | 34 % | 47 km/h | 0.0 mm | High 28 |
| 22 Sept | 24.1 °C | 11 % | 37 km/h | 0.0 mm | Very high 39 |
| 23 Sept | 18.1 °C | 29 % | 31 km/h | 0.0 mm | High 31 |
| 24 Sept after | 13.8 °C | 47 % | 44 km/h | 0.9 mm | Moderate 15 |
| 25 Sept after | 11.3 °C | 55 % | 31 km/h | 4.2 mm | Very low 2 |
Its twins: fires that started in the same weather
It started with an FWI of 12.9, a minimum humidity of 15% and 5 days without rain. Fires in the area that started in weather like this since 2016: 11.
FWI at the start
12.9
Minimum humidity
15 %
Days without rain
5
this fire
chosen twins
rest of the area
Almost identicalSimilar
Outlines of the closest twins
This fire · Peace River B fire, 2 May 2023
28,486 ha
145 days
FWI 12.9
Min. humidity 15 %
Peace River B fire, May 2024
2,295 ha
101 days
FWI 19.6
Min. humidity 18 %
154 km away, in 2024
First rain (1 mm or more) after it ended: 1.8 mm on 26 Aug.
Clear Hills fire, April 2016
18,533 ha
103 days
FWI 20.6
Min. humidity 10 %
85 km away, in 2016
First rain (1 mm or more) after it ended: 2.5 mm on 31 Jul.
Northern Rockies fire, May 2024
8,804 ha
103 days
FWI 19.8
Min. humidity 18 %
202 km away, in 2024
First rain (1 mm or more) after it ended: 18.0 mm on 27 Aug.
Northern Rockies fire, May 2024
3,603 ha
25 days
FWI 20.4
Min. humidity 19 %
166 km away, in 2024
First rain (1 mm or more) after it ended: 3.1 mm on 3 Jun.
Northern Lights County fire, May 2019
36,519 ha
40 days
FWI 25.6
Min. humidity 15 %
211 km away, in 2019
First rain (1 mm or more) after it ended: 6.1 mm on 20 Jun.
What happened to them
Fires in the area that started in similar weather: 11. 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
4.2 mmfirst rain
25 Sept2 days after it ended
65km/h · max. gust
It was considered over on 23 Sept, and on 25 Sept 4.2 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 · 25 Apr 2023
After · 30 Sept 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 15 May 2023 the air beside the fire reached 216 µg/m³ of PM2.5. That day averaged 114: 7.6 times the WHO daily guideline (15).
PM2.5 peak216 µg/m³
Days over the guideline81 days
PM10309 µg/m³
Optical depth5.48
WHO 15
3 May2 Jun2 Jul1 Aug31 Aug
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 · 2,968Every 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 Peace River B fire last?
- According to the heat detections seen by satellite inside the perimeter, it burned from 2 May 2023 to 23 September 2023 (145 days). The perimeter dates it from 5 May 2023 to 22 September 2023.
- How much area did it burn?
- The official perimeter mapped by Canada’s CWFIS (Natural Resources Canada) is 28,486 hectares (284.9 km²). Other tallies, such as those of provincial agencies, may give slightly different figures.
- Which census subdivisions burned?
- The fire only entered Peace River B (28,310 ha, 0.3 %).
- What was the weather like?
- During the fire the temperature reached 31.9 °C, humidity dropped to 11 % and gusts hit 65 km/h. The fire danger index (FWI) reached 51, class Extreme.
- 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 5 May 2023 to 22 September 2023. 2,968 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.