There are a lot of "unofficial" emergency shelters, in churches, and a lot of them aren't reporting, in as timely a fashion, as the state run emergency service wants them to.
Kali Tyranny is like that.
People evacuated to all across California and into Nevada, the most common emergency shelter is a family member or friend. A winery near me is hosting a family from Paradise and they did not register with Butte County.
As I tell everyone, make sure you register at shelter before you leave the area - lie if you have to that you’re staying at the shelter and once the paper work is completed and you’ve had a cup of coffee, then go check out with your destination.
FEMA registration can be done online at http://disasterassistance.gov, https://safeandwell.communityos.org/cms/index.php is technically Red Cross shelter registration (but I say do it in person.)