火灾是各种灾害中，发生频繁、损失重大的灾种。
Of all the calamities, fire is the one frequently occurred and makes heavy loss.
洪涝是危害极为严重的灾种之一，并正在日益加剧。
Flood is one of the most serious disasters which are of great harm and increasing continuously.
地震次生火灾作为地震次生灾害中发生最频繁的灾种，起火原因复杂其危害性也十分巨大。
As the most frequency post-earthquake disaster, the reason of the post-earthquake fire is sophisticate and its harm is huge.
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