When looking at a building burn, we always pay a lot of attention to how the fire breathes. In this case, the upwind windows were used as air inputs for the fire.
You can really see how the flames are pointed towards the inside of the building. Despite the strong draft of air towards the house (or cabin to be honest), the heat even several metres away was intense.
Every time I walk around with a camera around a fire, I keep my hands without gloves. If the heat is too much for my hands, the camera won’t like it either.