Fire - rudder

Japanese: 火事 - かじ

It is called a fire because it is something that is useful to humans that is burned. In the Fire and Disaster Management Agency, fire statistics are divided into six categories: building fires, forest fires, ship fires, aircraft fires, vehicle fires, and others. Of these, building fires account for more than half of the total. The total number of fires is around 60,000 every year, with 54,987 in 1998, resulting in 2,077 deaths and 7,256 injuries. The most common cause of fires is arson, followed by cigarettes. The reason why fires are more common in winter is related to meteorological factors such as low humidity and strong seasonal winds. Also, the characteristics of fire-resistant buildings such as buildings are different from those of wooden houses. In the latter, white smoke generally rises when the fire inside the building has progressed a little, which then subsides temporarily due to lack of air, and then black smoke is emitted. When the inside of the building is burned out and convection improves, the fire rapidly progresses. In a light breeze, it takes 13 to 24 minutes from the start of the fire to the end of the fire. The temperature of fire is 500 to 1000 degrees Celsius. The speed at which fire spreads is proportional to the wind speed. Sparks may be carried violently by air currents, or they may be lifted high into the air by tornadoes. → Fire prevention/Forest fires

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

人間にとって有用なものが燃えてしまうという点からは火災と呼んでいる。消防庁では火災統計上，建物火災，林野火災，船舶火災，航空機火災，車両火災，その他の六つに分類しており，このうち出火件数では建物火災が半分以上を占める。総出火件数は例年６万件前後で，1998年には５万4987件，死者2077人，負傷者7256人。出火の原因は，放火によるものが最も多く，ついでたばこ。火事が冬季に多いのは湿度が低下し，強い季節風が吹くなどの気象的原因と関係している。またビルなどの耐火建築と木造家屋ではその性状は異なる。後者では一般に，屋内の燃焼が少し進んだとき，白煙が立ち上り，これが空気の不足で一時衰え，次いで黒煙を吐き出し，内部が燃え抜かれて対流がよくなると一気に火盛りに移る。微風下で出火から焼落ちまで13〜24分。火の温度は500〜1000℃。火の伝わる速さは風速に比例。火の粉は気流に乗って激しく流れる場合と，竜巻が起こって高くもちあげられる場合がある。→防火／山火事

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