First, check your pipes and the condition of their insulation; if they need to be properly covered, hire a Newmarket plumber to install new insulation around your exposed pipes, including those in your crawl space and the attic. These are the spots where your plumbing is most susceptible to freezing. Additionally, insulate your outdoor plumbing and other unheated areas in your home where they are found.
Second, be proactive and check your pipes for any need for heating cables or tapes. Heating cables can help raise the temperature of the pipes enough to avoid freezing. For longer lasting service, get a professional to install them.