How should you direct spray from a fire extinguisher during a fire?

Directing the spray from a fire extinguisher at the base of the fire is essential because this is where the fuel source is located. When you apply the extinguishing agent directly to the base, it effectively interrupts the fire's fuel supply, which is critical for extinguishing the flames. By targeting the base, you are addressing the source of the fire rather than the flames themselves, which can often provide only temporary results if not correctly targeted. This technique maximizes the effectiveness of the extinguisher, as it helps to smother the fire and cool the fuel, reducing the chances of re-ignition.

Other methods, such as spraying at the flames or into the air, could prove ineffective or even dangerous, as they might not address the fire's root cause directly. Directing the spray at surrounding areas may help prevent spread but does not extinguish the active flames, which is the primary goal during an emergency.