What is one of the major risks associated with storing flammable liquids?

The major risk associated with storing flammable liquids is indeed fire hazards leading to explosions. Flammable liquids vaporize easily and can form ignitable mixtures in the presence of air. When these vapors come into contact with an ignition source – such as sparks, flames, or even hot surfaces – they can ignite, potentially resulting in a fire. This fire can escalate rapidly, especially in environments where flammable vapors are concentrated, leading to explosive situations. Proper storage practices, such as using appropriate containers, maintaining proper ventilation, and ensuring that potential sources of ignition are eliminated, are crucial to mitigating these risks.

Other aspects listed, such as the low cost of materials, risk of chemical reactions, and increased pressure in storage tanks, are indeed important considerations in chemical storage, but they do not directly capture the immediate and significant threat that the flammability of liquids presents in such scenarios.