What happened to the fire after the collapse?

After the collapse, the fire spread rapidly, igniting a flashover, which is a critical phenomenon in fire dynamics. A flashover occurs when the temperature in a room becomes so high that all combustible materials ignite almost simultaneously. This situation can occur due to an increase in heat from the fire, often exacerbated by structural changes caused by a collapse.

The context of a building collapse can significantly affect fire behavior. As the structure fails, it may change the airflow dynamics, leading to increased oxygen supply which can accelerate combustion. Additionally, when debris falls onto hot surfaces or the fire itself, it can create further ignition points or serve as fuel for the fire, resulting in rapid spread and increasing the danger level for both the building and firefighting efforts.

In contrast to the other options, which suggest the fire was either extinguished, contained, or reduced, these scenarios do not align with the typical risks associated with structural collapses in fire situations. In such events, the likelihood is that conditions will worsen, leading to a more uncontrollable fire scenario.