When you see the fire engine in a dream, then it shows how you are looking after the others instead of looking after yourself. The dream shows that you tend to give more, than receive. Maybe the unconscious mind of yours is trying to tell you to be more careful about yourself? Make sure you start looking after yourself.
Dream dictionary: Fire-engine dream meanings
…To see a fire–engine, denotes worry under extraordinary circumstances, but which will result in good fortune. To see one broken down, foretells accident or serious loss For a young woman to ride on one, denotes she will engage in some unladylike and obnoxious affair….