The words "bomb" and "cyclone" are bad enough on their own. What does it mean when they're used to describe a storm?

The cyclone ‘Fengal’ has resulted in the rise in temperatures 6 degrees Celsius in districts like Bhopal and Indore, whereas, ...

A powerful storm is bearing down on the West Coast and bringing with it a scary-sounding weather term—bomb cyclone. Bomb cyclone is a term used by weather enthusiasts to describe a process that ...