In some bubbles yes. During the aussie bushfire I checked the government app, and using Twitter didn’t cross my mind. If anything Reddit has been much better for local information, but usually for the Monday quarterback stuff rather than timely info.

Twitter isn’t used by that many people in the US. 2022 numbers seem to show >20% of the country population is active on the platform. Even LinkedIn(!) broadcast would reach more people.

https://www.pewresearch.org/short-reads/2022/05/05/10-facts-...

Then we're conflating low valur alerts with high value ones and the value of the signal is lost.

Until twitter makes an actual emergency alert system, Twitter is not better than a dedicated alert app.

If people have and use Twitter. I never have, so I would never receive the messages.