Fire Tornado

Japanese: 火事旋風 - かじせんぷう

This refers to the whirlwind that occurs with a large-scale fire. The outbreak and spread of a fire is greatly influenced by weather conditions such as wind speed and humidity, but once a fire has started, an updraft is created above it, resulting in new strong localized winds. In the case of a large fire, a strong swirling wind (whirlwind) often occurs. It is widely known that a large fire broke out during the Great Kanto Earthquake (September 1, 1923), and a fire tornado occurred in the vacant lot of the former Honjo Clothing Factory, killing many people, including those who had been evacuating. [Takeuchi Kiyohide]

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

大規模の火事に伴って生じるつむじ風をいう。火事の発生や延焼は，風速，湿度などの気象条件に大きく左右されるが，いったん火事になると，その上で上昇気流ができる結果，新たに局地的な強い風を生じる。大火の場合，しばしば渦を巻く強い風(旋風)となる。関東大震災(1923年9月1日)に際して大火が発生し，本所被服廠跡の空地に火事旋風が起こり，避難していた人など多数の人が犠牲となったことは広く知られている。【竹内清秀】

出典　株式会社平凡社世界大百科事典第２版について　情報

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