Which of the following actions should you avoid when dealing with a flammable liquid spill?

When dealing with a flammable liquid spill, using water to dilute the spill is highly discouraged because it can lead to dangerous situations. Water is often ineffective in managing flammable liquids, particularly if the substance is lighter than water, which can cause it to float and spread rather than contain it. Additionally, some flammable liquors can react violently with water, creating hazardous vapors or even igniting fires.

In contrast, evacuating the area is a necessary safety measure to protect personnel from potential harm, and using absorbent materials to control and clean up the spill is an appropriate response that helps to contain the material without increasing the risk of ignition. Securing the area prevents unauthorized personnel from entering and exposes to unnecessary danger. Therefore, avoiding the use of water during a flammable liquid spill response is vital for safety and effective spill management.