Fight fire with fire is a technique used in fighting some wild fires. A wide line is intentionally burned in a controlled way, somewhere ahead of a marauding fire and when the fire reaches the line the lack of fuel hopefully stops the wild fire at that line.

"Fight Fire with Fire" is also used as a slogan for prescribed burning even when there is not an immediate threat of a current wild fire. Prescribed burning reduces the highly flammable plant material there by reducing the chance of future wild fires. It can also be used to regenerate forests, grasslands and the wildlife that depend on them.