The Bobcat fire ignited on Sunday and quickly grew to threaten Mount Wilson.
We’ve just gotten an evacuation warning, so I’m searching around a bit to find sources to back up the text that disappeared. So far there’s nothing in the media, and it may take a half an hour or more to find more details. This is the only recent story online at the moment and there are a few spurious tweets that cover Altadena in the warning, but those are entirely unsourced.
Phone notifications that disappear too quickly in emergencies can be really bad UI.