There is a hierachy of cell-phone alert levels in n North America. The highest level (1, "National," formerly "Presidential") can't be turned off, and automatically sets your phone to maximum volume. This is the "NUCLEAR ATTACK IS IMMINENT!!!" level.
In Canada, all alerts, including weather and Amber alerts, are coded to level 1 by CRTC fiat. On newer phones, you can't opt out of any of them, any time of day or night, if you're connected to a Canadian cell tower.
If you live in Ottawa and your phone woke you at 4:30 am today, screeching at max volume — despite being in "sleep" or "do not disturb" mode — for something happening hundreds of kilometres away in another province, once your heartrate slows and you're able to breathe again, the CRTC are the ones to take it up with.
p.s. People without landlines keep their phones by the bed b/c a phone charging in the basement overnight is no use for calling 911 in a sudden emergency, especially for those of us with serious health issues.










