I know of one Cree community, Oujé-Bougoumou. They have a central heating plant and it's actually wood scraps that they use. It's the only community I know that has been doing that, and they're below the treeline. Most communities that are below the tree line also happen to have access to electricity. It's really the very remote communities that are generally north of the treeline that have to use diesel power plants.
On February 15th, 2018. See this statement in context.