What should you do if directed to help fight a fire with a portable fire extinguisher?

When using a portable fire extinguisher, directing the spray in a sweeping motion toward the base of the fire is the most effective technique. This method ensures that the extinguishing agent reaches the source of the flames, which is at the base of the fire, rather than just targeting the flames themselves. By sweeping the extinguisher from side to side, you cover a larger area and can effectively smother the fire.

This approach helps to eliminate the flames' fuel source and can also prevent the flames from spreading further. It's important to get as close as safely possible to the fire while still maintaining a safe distance. Doing so enhances the effectiveness of the extinguishing agent.

Other options, such as spraying directly at the flames from a distance or using the extinguisher on the surrounding area, may not adequately address the fire’s source, potentially leading to a lack of control over the situation. Attempting to throw water on the fire can be dangerous and is not an effective method for using a portable fire extinguisher, especially with certain types of fires that can react adversely to water.