嵐(あらし) arashiは waもっと motto激(はげ)し()く() hageshikuなって natteきた kita。 The storm grew even more violent. Literal Storm [topic-は] more fierce became. もっと激しくなってきた uses ~てくる (change approaching) — the storm is getting worse from the speaker's perspective. 激しい (fierce/violent) in comparative form. weather~てくる (change over time)
嵐(あらし) arashiは waもっと motto激(はげ)し()く() hageshikuなって natteきた kita。 The storm grew even more violent. Literal Storm [topic-は] more fierce became. もっと激しくなってきた uses ~てくる (change approaching) — the storm is getting worse from the speaker's perspective. 激しい (fierce/violent) in comparative form. weather~てくる (change over time)