Purely an opinion. I don't KNOW for sure.
I'd think that tomato could be in real trouble.
For the fruit blossoms, I think it depends on how cold it really gets and how long it stays cold. I don't think a light quick freeze is that bad, but a hard or long freeze will seriously impact the crop.
With the citrus, I'd consider processing the fruit.
You can try pouring water over it. Not hot or very warm water, just enough to melt that frozen stuff. When that stuff thaws, it will suck a lot of heat out of the vegetation.
Good luck with it but I agree, that is not good.