How does Rudolfo Anaya use imagery in Bless Me, Ultima?

Imagery:

It was very strange to see the women in black hurrying out of the house and into the howling storm. It was like seeing death leave a body.

The lonely river was a sad place to be when one is a small boy who has just seen a friend die. And it grew sadder when the bells of the church began to toll, and the afternoon shadows lengthened.