From our friends @mulcrone&Assoc:
Extremely cold weather is sweeping from the Rockies, into North Texas, and across towards the East coast, covering about 2/3 of the US.
With the low temperatures, extra caution must be exercised with the handling of 600-volt building wire products (primarily THHN).
Remember that wire that ships over the next several days will be exposed to these cold temperatures while in transit and will need to be warmed in a temperature-controlled environment for at least 24 hours before use.
As always, call 844-PARAMONT (844-727-2666) with any questions about safe handling of materials.