Drones are slowly, very slowly, becoming firefighting (and fire-starting) tools. A company in China is using one to burn debris on power lines.
In this video a flame-throwing drone uses fire to remove what appears to be plastic on a high-voltage line.
Earlier we have written about an experimental drone that drops plastic spheres which ignite a prescribed fire after hitting the ground. And the Lockheed Martin and K-Max Corporations have modified a Type 1 helicopter that can be remotely-piloted to drop water on a fire and haul cargo in an external load.