Fire handling in high-temperature areas

Where did this rule come from? Are there any prerequisites? This statement sounds really strange

• In the following special situations, water is generally not suitable for extinguishing fires. • ①Water should not be used to extinguish fires involving water-repellent materials such as light metals and calcium carbide. • ②Flammable liquids that are immiscible with water and have a lower density than water (such as gasoline, kerosene, etc.) cannot be extinguished using water in the event of a fire. • ③Intense water streams cannot extinguish fires involving live electrical equipment, nor can they put out fires in areas where combustible dust has accumulated. • ④Intense water streams cannot be used to extinguish fires in areas where large quantities of concentrated sulfuric acid or concentrated *ao acid are stored. • ⑤In the event of a fire in high-temperature equipment, it is not advisable to use water to extinguish it, as this can affect the mechanical strength of the metal. • ⑥In the event of a fire involving precision instruments and equipment, valuable cultural relics and archives, or books, it is not appropriate to use water to extinguish the fire.

This sentence is incorrect, right? If the area affected by high temperatures is made of non-metallic materials such as plastic and catches fire, can’t water be used to put out the fire? This estimate is suggesting that when metal equipment is exposed to fire, pouring cold water on it will cause the equipment to deform. The term \"high temperature\" is only qualitative and cannot be quantified.