How does fire behave when it reaches a point where a ridge drops off into a canyon?

When fire reaches a point where a ridge drops off into a canyon, it may change direction due to the effects of air flow. As the fire travels up the slope of the ridge, the airflow dynamics can shift as it encounters the steep drop into the canyon. This change in terrain can create different wind patterns and turbulence, which may push the flames in a new direction. Canyons can act as funneling agents for winds, intensifying the fire's behavior as it moves into lower areas. The interaction of air currents with the topography significantly influences how the fire spreads and can lead to rapid changes in its movement, making it essential for fire management to understand these dynamics.