I haven't seen any support for that claim, though you're the second informed and reasonable person to make it.
This morning Volokh adopted the same analysis I made above in post 222.
A provider of ... electronic communication service to the public shall not knowingly divulge a record or other information pertaining to a subscriber to or customer of such service ... to any governmental entity.What you posted in 222 is the only close-to-point exception to the prohibition. However, to paraphrase Orin Kerr at Volokh, to believe that an emergency involving immediate danger can be ongoing for 4+ years isn't exactly reasonable.