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Cool to see that Google Docs gives me this warning too https://imgur.com/a/B6qSboV

That's it? "Tsunami Warning", no context? no advice on what to do to avoid panic?

I would suggest that this is based on location of the IP address. I'm not getting it on the other side of the world.

Presumably a person receiving such an alert would have a heightened sense of self preservation and would investigate further..