NIST campus status: Due to elevated fire risk and a power outage for the Boulder area, the DOC Boulder Labs campus is CLOSED on December 19 for onsite business and no public access is permitted; previously approved accesses are revoked.[1]

WWV still seems to be up, including voice phone access.

NIST Boulder has a recorded phone number for site status, and it says that as of December 20, the site is closed with no access.

NIST's main web site says they put status info on various social media accounts, but there's no announcement about this.

[1] https://www.nist.gov/campus-status