An indirect attack is indicated when the temperature is increasing and it appears that ______ is about to happen.

An indirect attack is utilized in firefighting when there is a significant risk of flashover occurring. Flashover is a rapid fire development situation characterized by the simultaneous ignition of all combustible materials in a room or space, usually triggered by extreme heat. In this scenario, the temperature rising indicates that conditions are reaching a critical point where flashover could easily occur.

Using an indirect attack helps firefighters to cool the space from a safe distance, often through the use of water streams aimed at the ceiling or upper areas, which can help absorb heat and bring down the temperature. This technique serves to prevent the immediate danger of flashover, making it a crucial tactic in situations where indicators suggest that a rapid fire escalation is imminent. Implementing this method can potentially safeguard both the firefighters and the structure from the devastating effects of flashover.