Call this number to get USPS facility information during an emergency
From the article: "The national hotline offers up-to-date information ...The toll-free number, found on the back of most USPS employee badges, is 888-EMERGNC ( 888-363-7462 ). After dialing the number, you will be prompted to enter the first three digits of the ZIP Code where you work. Information specific to operations in your work area will then be relayed. ..."
Article Reference: news.usps.com