It's literally down. https://news.bloomberglaw.com/health-law-and-business/hhs-we...

DNS is probably cached on your ISP. It's down world wide [1]

[1] - https://www.whatsmydns.net/#A/hhs.gov

[Edit] Now it's back.

still does not work for me, I did wait about 15 minutes before trying to get the idea of it is a local issue or something more widespread.