Last night around 11pm I was awakened by an alert on my phone telling me
that 911 service was down, and giving me an alternat number to call. By
morning, it was clear that it wasn't a local problem. A quick search
showed that the problem was caused by CenturyLink, which tweeted, blaming it on a
a network element that was impacting
customer services and saying that they estimated it would be fixed in
about four hours.
It was more like twelve here on Whidbey Island, and some parts of the country are still (as of 2pm) offline, according to Outage.Report. The FCC is investigating.
If you live in Washington, king5.com has a handy list of numbers to call, by county. (The news article also has auto-playing video - you may want to mute your speakers.)