what kinds of figurative language does king use in his speech to decscribe inequality and the work of the civil rights movement

Metaphor: King compares injustice and oppression to sweltering heat and freedom and justice to an oasis. Analysis: King repeats the sweltering heat metaphor toward the end of the speech, referring specifically to Mississippi, a state where some of the worst offenses against blacks had been carried out.

i found this by google hope this helps...

Americans often speak of their country as one of several large regions.  these regions are cultural units rather than governmental units --  formed by history and geography and shaped by the economics, literature and folkways that all the parts of a region share. what makes one region different from another? a region's multicultural heritage as well as distinct demographic characteristics like age and occupation make regions different and special. within several regions, language is used differently and there are strong dialects. there are also differences in outlook and attitude based on geography.