Why is understanding water supply important in firefighting as per the NFST?

Understanding water supply is vital for effective firefighting operations because water is the primary agent used to extinguish fires. Knowledge of the water supply system allows firefighters to determine the availability, accessibility, and pressure of water, which directly impacts their ability to combat a fire efficiently.

An adequate water supply ensures that firefighters can deliver the necessary volume and intensity of water to extinguish flames and cool the surrounding environment, preventing the fire from spreading. This understanding helps fire personnel make quick decisions about how much water is needed, which equipment to use, and how to establish a water supply at the fire scene.

Moreover, by knowing the layout of hydrants, sources of water, and any potential limitations, firefighters can plan their operations more effectively, thereby improving their response times and overall operational success in controlling and extinguishing fires.