From Newsweek:
Several Social Security offices have been closed today amid the larger government shutdown. ...
In California, the Madera Social Security office is unable to provide in-person service until 1 p.m. local time.
Meanwhile, in Montana, the Havre office is only able to provide telephone assistance until further notice due to the shutdown.
New York is facing several disruptions, with the East Bronx location unable to provide in-person services until 10 a.m., and Canarsie and Corning locations only providing phone assistance until further notice.
The Pennsylvania office in Wilkes-Barre is only offering phone assistance on Monday, while Bloomsburg and Reading offices have generally reverted to phone service instead of any in-person options until further notice.
In South Carolina, the Spartanburg office will only be providing phone service on Monday, and the Dallas Fair Park office in Texas will be offering the same service instead of in-person capabilities.
In West Virginia, the Logan SSA office is only available by telephone.
In Wyoming, beneficiaries relying on the Cody office will need to use phone services until further notice. ...
Some of these have to do with local conditions which might occur anytime. Some of these have to do with the reduction in staffing at Social Security. Some of these have to do with the government shutdown. When people aren't being paid, they're not as enthusiastic about showing up for work when they're not feeling so well.