National Geographic photographer Mark Thiessen has been capturing images of wildfires for decades. Qualified as a wildland firefighter, he has been able to access areas that most photographers can never see. Below are two videos that highlight some of his work.
The first one is rather general and explains what he does on a fire. The second is about the Crown Fire Experiment in the Northwest Territories of Canada, which is an effort to research fire behavior in crown fires.
Great videos, well done. Does he have any documentary length videos?