A fire tornado swirls near a chimney on the roof of a burning house in an unidentified location (file photo).

在这张地点不明的资料照片中，火龙卷风在一栋着火房屋的烟囱旁旋转着。

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A fire tornado consists of a core-the part that is actually on fire-and an invisible pocket of rotating air that feeds fresh oxygen to the core.

火龙卷风是由一个正在燃烧的核心和看不见的一片旋转气流组成的，旋转气流不断把新鲜空气注入核心。

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The temperature inside the core of a fire tornado can reach up to 2,000 degrees Fahrenheit (1,093 degrees Celsius)—hot enough to potentially reignite ashes sucked up from the ground, Forthofer said.

火龙卷的内部核心温度可达2，000华氏度（1，093摄氏度），其高温足以将潜在的灰烬从地面吸入重新点燃，福托菲尔说。

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One of the things that happens, whether it's a fire here in Colorado, or a tornado in Alabama or Missouri, or a flood or a hurricane in Florida, one of the things that happens here in America is when we see our fellow citizens in trouble and having difficulty, we come together as one American family, as one community.

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