What is a barrier in relation to fire spread?

A barrier in relation to fire spread refers to a space that lacks any flammable fuel. This absence of combustible material can effectively halt or slow down the movement of fire, as there is no fuel for the flames to sustain themselves. Barriers can take various forms, such as a cleared area, a body of water, or any surface that is devoid of grass, shrubs, trees, and other fuels that can ignite. Understanding the role of barriers is crucial for fire management and planning, as they can be strategically utilized to create fire breaks and reduce the spread of wildfires, making them an essential element in firefighting tactics.