Apple will automatically share the location of 911 callers in iOS 12 June 18, 2018 https://betanews.com/2018/06/18/apple-911-location-sharing-ios-12/
That makes sense, no? I mean, why would I call 911 unless I wanted my location known? That's how it works with old school cellphones. I was seriously freaked the first time I called 911 from a cellphone. The system locked the call, and wouldn't let me disconnect. I presume that it was tracking via cell towers. I was reporting a vehicle on an interstate at night, which blew by me at >>100 kmph with no lights, and behaving erratically. But they didn't have my location very accurately, because I had to give them a mile marker. It does bring up the issue of calling 911 for mental health stuff. And too soon, in the midst of fights that would otherwise resolve without violence. The police are usually not the best resource for someone who's suicidal, for example. Or maybe you feel threatened by your partner or child, but (upon reflection) really don't want them to face criminal charges. It's a tough call, I know. But with automatic location, you don't have the option to reconsider during the call. Or at least, less chance of that.