YOU SAID:

Raining cat's and dogs

INTO JAPANESE

雨が土砂降り

BACK INTO ENGLISH

Rain is pouring

INTO JAPANESE

雨が降っています

BACK INTO ENGLISH

It's raining

INTO JAPANESE

雨が降っている。

BACK INTO ENGLISH

It is raining.

INTO JAPANESE

雨が降っている。

BACK INTO ENGLISH

It is raining.