Possible. All I know is calling 911 on my phone with cell only failed mid morning yesterday EST while I had no service. My local news put out an announcement the 911 operators were having issues receiving calls due to issues with ATT.
Connecting to WiFi to call 911 failed. Again, could be my county. Called non emergency local number over WiFi: success. They transferred me to 911
I love how you can see at least one (maybe two) people trying to peep from the street below.