I can't tell you about Canada, but in the US we compile statistics around it. https://www.nps.gov/articles/wildfire-causes-and-evaluation.htm https://www.nps.g

I can't tell you about Canada, but in the US we compile statistics around it. https://www.nps.gov/articles/wildfire-causes-and-evaluation.htm https://www.nps.gov/articles/wildfire-causes-and-evaluation.... >Nearly 85 percent* of wildland fires in the United States are caused by humans. Human-caused fires result from campfires left unattended, the burning of debris, equipment use and malfunctions, negligently discarded cigarettes, and intentional acts of arson. *Source: 2000-2017 data based on Wildland Fire Management Information (WFMI) and U.S. Forest Service Research Data Archive Note that conditions like powerline failures are considered human caused in the above information.