Freezing temperatures during the day and night have led to the Greenville Homeless Shelter being under what they call "Condition White", meaning the temperature outside is under 40 degrees.
When that happens the Greenville Homeless Shelter is open 24 hours so that no one is forced out into the cold.
Normally people can check in at 6 PM and then the following morning they have to leave by 8 AM.
But because of the freezing cold, the shelter is now open around the clock.
Supervisor of the Greenville Homeless Shelter Jeff Schwartz says the shelter believes it's very important to keep people out of the cold, especially women, young children, and the elderly.
As of Tuesday afternoon Schwartz said the shelter was almost completely full with only a few beds left, he expects to be completely full by Tuesday night.
And he says the shelter will remain open 24 hours until the cold temperatures improve.