Which factor can lead to the creation of a fire storm?

The creation of a firestorm is significantly influenced by the availability of a large fuel source with low moisture content. When fuels such as dry vegetation, timber, or other combustible materials are abundant and have low moisture levels, they can ignite more easily and burn at higher temperatures. This situation can lead to intense fires that generate their own wind systems, often referred to as firestorms. The intense heat produced by the fire causes air to rise rapidly, creating strong upward currents that draw in additional air and promote rapid fire spread.

In contrast, high humidity levels and frequent rainfall typically contribute to moisture retention in fuels, making them less likely to ignite or sustain combustion, while the presence of snow on the ground creates additional moisture that further decreases the likelihood of a fire starting or spreading. These factors inhibit rather than support the conditions necessary for the development of a firestorm.