Ok lets start this off with a quick Fire Scene Question.
You are dispatched to a reported Tire Fire next to a residence, with three calls and smoke being called in from 5 miles away.
What Do you Call? Use your Mutual Aid Plans.
I would respond in with 1st Alarm and see what I had before calling a lot of extra companies. Is this a hydrant area? If not I might start two additional tankers for the extra water.