"I'm very concerned that there are arsonists," Smith said.
"And there have been stories as well, that we're investigating and we're bringing in arson investigators from outside the province."
As Canada experiences a record wildfire season, speculation has grown that many of these fires were started deliberately. Alberta has brought in additional arson investigators to determine the cause of the fires, while some Provincial and Federal politicians, including Alberta Premier Danielle Smith and PPC Party Leader Maxime Bernier, have claimed that arsonists are to blame for this year’s increase in fires.
Wildfires are typically started in two ways - lightning strikes and human activity.
Nationally, the
Canadian National Forestry Database found that lightning causes about 50 percent of all fires but accounts for about 85 percent of the annual area burned. As the
National Post points out, this is generally because lightning strikes occur in remote areas, where fires that don’t threaten populated areas are either allowed to burn or are difficult for firefighters to access.
The exact split varies by province. In
British Columbia, for example, lightning strikes are responsible for 60 percent of wildfires, while in
Alberta, human activity accounts for an average of 68 percent of all fires.
Most human activity is accidental, with fires sparking from campfires, powerlines, industrial activities, and discarded cigarettes, among other causes.
Arson, or the deliberate and intentional setting of fires, is
generally rare, accounting for only 5 percent of total fires and less than 1 percent of total area burned each year. These are typically extinguished before they can grow into larger fires. Though there have been arson charges laid for arson related to wildfires, these have not historically been a significant cause of large-scale burning.
A US study, where human activity is already the cause of 84 percent of fires, found that arson was the source of 21 percent of all
human-caused fires, or around 18 percent of total fires.