Weather idioms
Do not forget your umbrella before you go outside. It is raining cats and dogs!
it is raining heavily outside
I'm not going on holiday this year, but every cloud has a silver lining, as I'm able to spend more time with my family at home.
something good can come out of a bad situation
Mike thinks he is going to pass his exams without studying. He has his head in the clouds!
Used to describe someone being overly-optimistic about a situation or to have unrealistic ideas about something.