Shock:
- I was shocked to hear…
- The news came as a complete shock.
- We're all in complete shock.
- Everyone's reeling from the shock of…
- It happened out of the blue.
- Who could have predicted it?
- I (just) can't get over …
- We were completely taken aback by…
- I was just stunned by…
Disbelief:
- I just can't believe…
- It's unbelievable.
- I just can't imagine…
- Words can't describe… (How I feel about / the terrible devastation etc)
- There's no way it could have happened.
Saying how bad something is:
- It's so awful.
- It's terrible.
- What a terrible news.
- It's a tragedy.
- It's a catastrophe.
- This is the worst thing that could have happened.
