Why does more than one fire apparatus respond to a simple incident?

Fire Department apparatus is dispatched according to information received by the 9-1-1 operator or the person reporting the emergency. The Fire Department responds prepared to deal with the worst that could happen based upon that information. In emergency services we have learned that if we assume something is "simple," we can be horribly mistaken. We respond as fast as we safely can, with personnel trained to provide the best service possible and apparatus sufficient to deal with the "worst" possible outcome. The winner in these situations will always be the citizen who needs help.