。
The storm did great damage to the crops.
Literal
Storm [topic-は] crops [to-に] large damage [object-を] gave.
大きな損害 (large damage) keeps 大きな as a separable adjective; the alternative compound 大損害 fuses 大 directly into the noun for a punchier, news-style word. 損害 specifically connotes financial or property loss. 与える (to give) is the standard verb for inflicting damage onto a recipient marked with に.