You should begin worrying about your water supply pipes freezing whenever outdoor temperatures drop below 32°F (0°C) for several consecutive hours or days, particularly when accompanied by strong, freezing winds. The risk escalates dramatically if temperatures plunge into the low 20s or teens. Furthermore, you should be highly concerned about uninsulated pipes located in vulnerable, drafty zones like exterior walls, unheated crawlspaces, attics, and garages where indoor heating cannot reach them effectively. Verification: Insulate all exposed pipes and monitor local weather forecasts for hard freeze warnings during winter.
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