This is a good time to make sure that everyone in your broader community is using Signal and knows how to anonymize their identity on it. This flier offers QR codes to make it easy. You can print out this design here:
https://cdn.crimethinc.com/assets/articles/2024/11/09/signal.pdf
You could use the blank space on the flier to add a third QR code directing people to a local announcements-only Signal thread to stay abreast of developments.
You can learn how to set one up here: