YOU SAID:
Raining cats and dogs out there.
INTO JAPANESE
そこに猫と犬の雨が降っています。
BACK INTO ENGLISH
It's raining cats and dogs there.
INTO JAPANESE
そこには猫や犬が雨が降っています。
BACK INTO ENGLISH
It's raining cats and dogs there.
That didn't even make that much sense in English.