Fire Department units are dispatched according to information received by the 911 operator. The Victoria Fire Department thinks pessimistically when they respond to citizens in need of help. In other words, the firefighters are prepared to deal with the worst that could happen.
A computer selects the closest unit to respond to an incident. The fire department’s philosophy is to get our firefighters there as soon as possible. In preparation for the worse case scenario, an ambulance often is dispatched as well.
There may be multiple fire department vehicles on the scene for what appears to be a "simple" incident. However, in emergency services we have learned that if we assume something is "simple," we can be horribly mistaken. Plus, we respond as fast as we can prepared to encounter the worst. The winner in these situations will always be the citizen who needs help.