11.   The first distant crash of thunder shook the air, and the rain began to pour down heavily.

12.   The rain began to fall, big sloppy drops as if some one were shaking out a paint brush.

13.   The sky grew dark, and a cold rain began to fall.

14.   The sky was overcast and a light rain began to fall.

15.   The sky was overcast, and a light rain began to fall.

16.   Towards sunset, the rain began to taper off.

17.   When the summer rains begin, the soil quickly becomes saturated.

18.   At that moment the sky darkened and the rain began to beat down.

19.   At that moment the rain began teeming down, and we all ran for shelter.

20.   Rain had begun to streak the window-panes.