Question

It rain heavily all the river in brox war in food​

Answer 1

Answer:

Hi friends good afternoon and take care of yourself.

Answer 2

Heavier is an comparative adjective.

Here, the correct use will be the first one, ie, It is raining heavily. This is a complete sentence itself. You can use the second one in informal/casual conversation. It is more of a cropped form of : It is now raining heavier than it was earlier.