These days, many home in NY area are having their water pipes getting burst due to freezing temperatures. This happens to copper tubes situated close to the outside walls of homes.
When water freezes in the copper pipes, it expands and bursts the copper pipes.
To avoid it, many homes have started using PEX pipes instead of copper pipes for their water supply within the homes. These PEX pipes have thick expandable material and would not burst even water freezes inside it.