Immediately after it caught fire, the chemical factory blew up.
Once the chemical plant caught fire, it exploded.
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火がつく， 火が付く， 火が点く， ひがつく
1. to catch fire, to be ignited, to ignite, to light (e.g. of a match)
2. to flare up (of an emotion, controversy, etc.), to blaze, to be ignited (of a dispute, commotion, etc.), to take off (of a boom, craze, etc.)
1. to do, to carry out, to perform
2. to cause to become, to make (into), to turn (into)
3. to serve as, to act as, to work as
4. to wear (clothes, a facial expression, etc.)
5. to judge as being, to view as being, to think of as, to treat as, to use...
