It's raining cats and dogs

US /ɪts ˌreɪnɪŋ ˌkæts ənd ˈdɔɡz/
UK /ɪts ˌreɪnɪŋ ˌkæts ənd ˈdɔɡz/
"It's raining cats and dogs" picture
1.

llover a cántaros, llover a mares

raining very heavily

:
I can't go out now, it's raining cats and dogs!
No puedo salir ahora, está lloviendo a cántaros!
We had to cancel the picnic because it was raining cats and dogs.
Tuvimos que cancelar el picnic porque estaba lloviendo a cántaros.