Director:
The police and fire departments did in fact evacuate Sunnydale with everyone else but now they are back in town and going about their business. Why? Someone told them to. Who? Now you don't want me to spoil the surprise do you?
So Graham and everyone else should be surprised by the presence of the police and fire fighters. I'm sure it will be discussed among the characters once they've escaped.
Ah good, glad I could react as expected. :)
Sorry for the delay but for being the last week of a semester, work was extra busy for some reason. Hopefully, it will slow down for a few weeks as we hit Maymester.