Cold and hot water, hot water is produced in a short time, the ignition cover, the water source without oxygen, will continue to burn, but in actual fire site, how can have hot water?

• 冷水和热水比较，热水较能在短时间产生水蒸气，把火源覆盖，火源得不到氧气，便不会继续燃烧，但在实际火灾现场，又怎会有热水呢？