I’ve always enjoyed using the word Catastrophe.
Full Definition of CATASTROPHE
1: the final event of the dramatic action especially of a tragedy
2: a momentous tragic event ranging from extreme misfortune to utter overthrow or ruin
3a: a violent and sudden change in a feature of the earth
b: a violent usually destructive natural event (as a supernova)
4: utter failure : fiasco <the party was a catastrophe>
– From Merriam-Webster.com