This document covers firefighter safety when battling fires in the wildland-urban interface. It discusses key principles such as prioritizing firefighter and public safety over defending property, only taking action when safe to do so, and understanding that structures are fuels that can burn. Firefighters must maintain situation awareness, have escape routes and safety zones in mind, and follow the principles of "look up, look down, look around" and risk management. Special considerations in the interface include fuels, terrain, structures, hazards, and only committing to fight a fire if an adequate escape route is available.