What changed in Canada's wildfires today?
A daily comparison of confirmed official provincial and territorial wildfire records available to FireRadar. Unavailable sources are omitted and not treated as zero.
November 4 vs November 3
The comparison includes the same 9 of 11 official source jurisdictions for both dates. Unavailable jurisdictions are omitted rather than treated as zero activity.
Reported active size changed by -4,662 ha across records with usable sizes. The number of active records with a reported size changed from 40 to 36. This reflects source revisions, not measured fire spread. Perimeter revisions are counted separately and do not necessarily indicate growth.
Which wildfire records changed?
These are differences between two completed daily comparisons. “Newly observed” means a record appears in the newer comparison; it does not establish when the fire started. Reported-size changes are source revisions, not measured spread, and significance labels only control display order.
Newly observed active records
Other observed status changes
Transitions to recent out are shown once in the dedicated column rather than duplicated here.
Moved to recent out
Largest reported-size movements
This page shows up to 25 examples in each category and prioritizes the most useful reported-size changes. The Canada and jurisdiction totals above include all records in the comparison.
What changed by jurisdiction
| Jurisdiction | Active | New | Status changes | Out | Perimeter changes | Reported ha |
|---|---|---|---|---|---|---|
| British Columbia | 21 | 1 | 4 | 4 | 0 | -4,661 ha |
| Ontario | 8 | 0 | 0 | 0 | 0 | -1 ha |
| New Brunswick | 4 | 2 | 0 | 0 | 0 | 0 ha |
| Quebec | 3 | 0 | 4 | 2 | 0 | 0 ha |
| Alberta | 0 | 0 | 0 | 0 | 0 | — |
| Manitoba | 0 | 0 | 0 | 0 | 0 | — |
| Newfoundland and Labrador | 0 | 0 | 0 | 0 | 0 | — |
| Nova Scotia | 0 | 0 | 0 | 0 | 0 | — |
About the FireRadar daily archive
This page compares FireRadar records collected from July 20, 2026 onward. Older CNFDB, CWFIS and provincial historical datasets are separate research records and are not added to this series retroactively.
What these changes mean
- Newly observed wildfire
- An official wildfire record present in the newer FireRadar observation but absent from the immediately preceding comparable observation. It does not establish ignition time.
- Reported size change
- The difference between two source-reported incident sizes within the stated comparable-source scope. It is not measured fire spread.
- Moved to out
- An official record whose status moved from active to out or extinguished between two comparable FireRadar observations.
- Official perimeter revision
- A change in official perimeter geometry recorded by FireRadar. It may reflect mapping, correction, boundary revision, or incident change and is not labelled burned-area growth.