Writes LoCO Hall-of-Fame commenter “Coreopsis has set in”:

The Tsunami Siren From PG&E is a Drill

It was preceded by some clown on a PA saying “Earthquake! Earthquake! This is a Drill!” several times.

In case you get calls.

That’s right — the “Great California Shakeout” just launched a few minutes ago. Expect to see people running around doing emergency-like things for a little while longer, even though no emergency currently exists.

What you want to do is identify those people doing emergency-like things. Then, in the case of an actual emergency, you can seek them out because they will know what to do.