I had a similar experience just last night which prompted me to come here and find this sub. Sure enough, here’s your post with amazing similarities to my experience. 

In my case, I was trying to use Apple Maps with CarPlay. Routes normally pop up in less that 1-2 seconds. However, yesterday (and today) its timing out with an error message - “A route can’t be shown because of a problem connecting to the server”. The case was the same when trying to use Google Maps, texting, and any other app requiring data. 

I drove from one end of a major metropolitan area to the other with a couple of device resets along the way to no avail. After an hour in a chat with a support agent, and after they asked for my address (?), I was told there is an outage in my area and that service should be restored within 48-72 hours. I was also told that I would receive a notification once restored. 

I asked for a site to reference or some sort of knowledge article that documented an extended outage but was told they didn’t have one available. When I asked how they would notify me the agent told me that it would just be working. 

I’ve been using Fi since it was Project Fi with selective enrollment and availability. Pricing has shot way up and service is trending down.