Primary Disaster - First Disaster

...When an earthquake occurs, facilities in various parts of the city are destroyed, causing traffic paralysis and various other functional paralysis, fires that would normally be put out spread, and water, gas, and electricity are cut off, making it impossible to live. This is secondary damage that is not a direct result of the earthquake. Direct damage such as houses collapsing due to an earthquake is called a primary disaster, and disasters that occur as a result of a chain reaction to direct damage such as fires are called secondary disasters. Functional and economic disorders are also called tertiary disasters. ...

*Some of the terminology used to refer to "primary disasters" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…地震が発生して市街地内のあちこちの施設が破壊され，それによって交通麻痺やいろいろな機能麻痺が起こり，普段であれば消せる火災が延焼火災に拡大したり，水道，ガス，電気が止まったために生活ができなくなるという地震の直接的被害でない二次的な被害も出る。地震によって家屋が倒壊するような直接的被害を一次災害と呼び，火災などのような直接的被害に連鎖して起こる災害を二次災害と呼ぶ。また，機能障害や経済的障害のようなものを三次災害と呼んでいる。…

※「一次災害」について言及している用語解説の一部を掲載しています。

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