A simile because it uses the word "like" to compare the day to the walk through the oven (in other news, slightly uncomfortable with that simile)
A Cause-Effect Relationship is a relationship in which 1 event ( i.e. cause ) make happen to another event ( i.e. effect ).
Example :
You set up an alarm the ringing of alarm is an event {cause} and in the result you wake up this is another event {effect}.