Police have confirmed that wildfires in Alberta are being caused by arsonists.

Police officers in Grand Prairie, Alberta have arrested one suspect, and are looking for several others in connection to an arson investigation, as reported by local media.

https://www.toronto99.com/2023/05/21/video-alberta-wildfires-caused-by-arsonists-one-suspect-in-custody-rcmp/
Here is the map

https://www.arcgis.com/apps/dashboards/3ffcc2d0ef3e4e0999b0cf8b636defa3

Over 470 unprecedented wildfires, which seem to be suspiciously placed, in a part of Alberta with heavy oil and gas production.

h/t MonkeyWrangler