5.It's raining cats and dogs today.
Stephen: Wow, you look like a drowned rat! Didn't you know there's a thunderstorm today?
Justine: I knew there would be a shower, but I didn't realize it would rain cats and dogs today.
Stephen: Well, you'd better take a hot shower right now, or you'll catch a cold.
Justine: I know. I don't want to get sick, especially during finals week.