In what scenario is a master stream typically deployed?

A master stream is typically deployed in scenarios involving large-volume fires because these situations require the application of a significant amount of water to suppress the flames effectively. Master streams are designed to deliver large amounts of water at high pressure, making them suitable for dealing with extensive structural fires, such as those found in large commercial buildings, warehouses, or when multiple vehicles are involved.

In these large-volume fire scenarios, the heat and intensity can be overwhelming, necessitating the use of powerful streams to quickly bring the fire under control. This tactic helps to cover a larger area and ensures that enough water is applied to combat the fierce fire conditions often present in such situations.

While master streams can also be used in high-rise fires, residential fires, or fires involving hazardous materials, these situations do not always require the same level of water delivery as a large-volume fire, which distinctly defines when a master stream is most appropriately deployed.