I must disappoint you - neither of your answers is correct.
Lommy, I suggest you try to rack your brain a little more to find an explanation even for the rain part
Gil, your interpretations are sometimes very... forced, and you certainly don't provide any interpretation for the "rain pouring down" part. That is no poetic filler to make a rhyme or anything like that. In fact, I suggest focusing more on the "rain pouring down" verse than on the "we left our homes" part - the explanation of the home-leaving is far, far less apparent, I believe.
But don't let that bring you down - keep trying