HOUSTON, Jan 22 (Reuters) - The water supply was restored to TotalEnergies 238,000 barrel-per-day (bpd) Port Arthur, Texas, oil refinery that has been shut down, people familiar with plant operations said on Monday.

Restoring the water supply was a necessary step before TotalEnergies can restart the refinery, the sources said. The refinery was shut by a plant-wide power outage on Jan. 16, when temperatures along the Texas Gulf Coast fell below 20 degrees Fahrenheit (minus 6.6 degrees Celsius). (Reporting by Erwin Seba; Editing by Christian Schmollinger)