Rewrite "It was raining cats and dogs" in your voice (or the voice of an author you like). Feel free to chime in with your own version in the comments.
Of course, I can't resist making up a new scene for Manon (of Mysterious Paris):
Manon pressed her face to the glass door of the cafe. When she had entered, the sky had been the merely overcast gray flannel that hung over Paris every day in November. Now water coursed and sputtered relentlessly, as if hissing gray tabbies were being chased by terriers. Manon remembered gripping her mother's hand while a barking dog ran past.
She sighed, then pushed open the door.