“7 Scary Signs You Need to Call a Plumber, Pronto”
By Holly Amaya, Realtor.com
https://www.realtor.com/advice/home-improvement/plumbing-problems-warning-signs-call-a-plumber/
“How to Prevent Your Pipes from Freezing”
By Mary H.J. Farrell, Consumer Reports
https://www.consumerreports.org/home-maintenance-repairs/how-to-keep-pipes-from-freezing/