2) It is important for the reader to know what things look like, but most readers do not want to be bored by long passages of description.  So, we slip description into our action; and we use good vocabulary, accurate words, and lots of verbs to help the reader 'see' the picture.

The canyon is flooding, and you are trapped.  It seems that there is disaster all around, and you are hurt and afraid.

Write your story.