Martin Luther King Jr. uses several metaphors in his letter to Birmingham jail. One in specific is "Let us all hope that the dark clouds of racial prejudice will soon pass
away and the deep fog of misunderstanding will be lifted from our fear
drenched communities."
Here he is comparing racism to that off of storm clouds and the darkness that storms bring without the sunlight of day.
Hope this helps! If you need any more help or would like further explanation just let me know!!! :)
