A number of interruptions distracting trains of thought (10)

I believe the answer is:

intrusions

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'trains of thought' is the definition.
The answer and definition can be both related to natural events as well as being plural nouns.
Maybe they are linked in a way I don't understand?

I can't explain the remainder of the clue.

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I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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