Cities in the southern United States are experiencing widespread pipe freezing.

As a severe cold front swept over the United States over the Christmas weekend and into the beginning of this week, multiple cities throughout the southern states experienced freezing, bursting water pipes. Much of the water infrastructure in these parts of the country is outdated and has not been brought up to current weatherproofing standards, leaving residents with either unclean water or no water at all.

The city of Jackson, Missouri had a particularly rough time over the holidays, as frozen pipes left many residents with little to no water pressure. City officials needed to set up emergency water distribution sites on Sunday to ensure everyone’s water needs were met.

“We continue to struggle to return pressure to the water system. We are producing significant amounts of water and pushing that into the system but the pressure is not increasing — despite those efforts at the plants. The issue has to be significant leaks in the system that we have yet to identify,” Jackson officials said in a statement.

Other major cities affected by pipe freezing include Shreveport, Louisiana, Selma, Alabama, and Greenville, South Carolina. While the cold weather has begun to subside in some parts of the country, the damaged water systems have left the residents of these affected cities on a boil water advisory for the foreseeable future.