"Romeo and Juliet" represents the violence of sword fighting and duels which was a common problem at the time.
AO3- It is said that Verona was known at "the hot city", which may act as a connotation of all the a aggression and hatred- as seen through the common street brawls. However "hot" may attempt to serve an explanation that his agression was a result of hot temperatures.
"For now, these hot days, it is the mad blood stirring." (Benvolio- Act 3, Scene 1)