The NWT government and city of Yellowknife are describing in tweets, Instagram messages etc. how to search key evacuation information on CPAC and CBC. The broadcast carriers have a duty to carry emergency information, but Meta and X are blocking links.
While internet access is reportedly limited in Yellowknife, residents are finding this a barrier to getting current and accurate information. Even links to CBC radio are blocked.
Meta doesn’t own a megaphone, though. It is but a lowly sharecropper who works the land of Microsoft, Google, and Apple. They let Meta use their megaphones sometimes, but only when it is on good behaviour.
It seems what you are really looking for is anyone with a voice to relay any important messages they hear.