calamitous

adjective2

1. •
   Causing or involving calamity; disastrous.

   • The city was struck by a calamitous cyclone.
2. •
   (no longer used) Of a person: involved in a calamity; hence, distressed, miserable.

   • Thou hast seen me happy and calamitous, thou hast beheld my exaltation and my fall. — 1752