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。
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。
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。
Fire tornadoes, also known as "fire whirls", only occur under certain conditions and form a vertical column of flames and hot air that behaves much like a normal tornado.
火焰龙卷风，也被称作“火旋风”，非常罕见。发生时火焰直线上升，如同龙卷风中空气的运行轨迹。
Fire tornadoes, also known as "fire whirls", only occur under certain conditions and form a vertical column of flames and hot air that behaves much like a normal tornado.
火焰龙卷风，也被称作“火旋风”，非常罕见。发生时火焰直线上升，如同龙卷风中空气的运行轨迹。
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