Is it safe to use water on a petroleum-based fire?

Using water on a petroleum-based fire is not safe because water can cause the burning liquid to spread rather than extinguish the fire. Petroleum products are less dense than water and will float on the surface, which can lead to the fire spreading over a larger area when water is applied. This can create a more dangerous situation, as the flames can jump and create additional hazards. Instead, specialized firefighting methods and materials, like foam or dry chemical extinguishers, are recommended for dealing with flammable liquids. Understanding the properties of the substances involved in a fire is crucial for effective and safe firefighting practices.