Calamitous (adjective)

Fraught with great danger : disastrous.

Origin:

From latin calamitosus, from calamitas, from calare to call down, from calus, variant of cālēre to be hot, from calēre to be warm.

Examples:

1. The storm was a calamitous event.
2. The accident was a calamitous event that left many injured.
3. The war was a calamitous event for the people.
4. The flood was a calamitous event that caused widespread damage.
5. The economic crisis was a calamitous event that led to widespread poverty.