YOU SAID:

Raining dogs and cats.

INTO JAPANESE

犬や猫を雨が降っています。

BACK INTO ENGLISH

It is raining cats and dogs.

INTO JAPANESE

激しく雨が降っている。

BACK INTO ENGLISH

It's raining cats and dogs.

INTO JAPANESE

バケツをひっくり返したような雨だ。

BACK INTO ENGLISH

It's raining cats and dogs.