YOU SAID:

straight off the bat, its raining cats and dogs yo

INTO JAPANESE

いきなり、猫と犬の雨が降っているよ、

BACK INTO ENGLISH

Suddenly it's raining cats and dogs,

INTO JAPANESE

突然、猫や犬に雨が降ってきました。

BACK INTO ENGLISH

Suddenly it rained on cats and dogs.

INTO JAPANESE

突然、猫や犬の上に雨が降りました。

BACK INTO ENGLISH

Suddenly it rained on cats and dogs.