devastating (adj)

If the bomb had exploded in the main shopping area, it would have been devastating.
The hurricane left a devastating trail of destruction, with homes and infrastructure reduced to ruins.
The forest fire had a devastating impact on the ecosystem, affecting wildlife and plant species.
The earthquake was followed by a series of devastating aftershocks, further intensifying the destruction.
The economic downturn had a devastating effect on local businesses, leading to widespread closures.