https://www.rd.com/article/los-angeles-wildfires-how-to-help/

https://www.nbcnews.com/news/us-news/how-to-help-victims-los-angeles-wildfires-rcna187274

https://laist.com/news/climate-environment/how-to-help-la-fire-victims
LAist has requests that are more local than the others, it seems, like volunteering and dropping off goods, so it might be useful for SoCal residents in those respects, but

ALL OF THE ONES LISTED ABOVE LOOK GOOD TO ME.

Comments welcome.

Edit to add
The following charities have been vetted by NBC News:

California Community Foundation
California Fire Foundation
L.A. Fire Department Foundation
Pasadena Humane Society
Ventura County Community Foundation
American Red Cross of Greater Los Angeles
Center for Disaster Philanthropy
Direct Relief
World Central Kitchen
Update: added NBC links here.
Do scan the others for charities you might like to support.
These were nicely grouped.

Compassion needs a channel.

He lives there and knows what will help the most

All of your donations go directly to relief work. The administrative costs are paid by the United Methodist Church. They've been at this since WWII, and they aren't there to proselytize, just to provide relief and assistance without regard to race, religion, or status.

There's a specific fund for the California wildfires at https://advance.umcmission.org/p-620-umcor-us-disaster-response-and-recovery.aspx

Suggest going to a Dollar Store. Was able to buy toothbrushes, hair brushes, combs, ziploc bags, soap, and many other items x6 for under $150.

Hit target for blankets, underwear, etc. Someone can hopefully provide a better option for blankets and towels.

And if you are retired like me and the spouse, go through the closet. I was shocked at how many good work clothes were hanging clean from the dry cleaner and never touched. A crapload of stuff bought pre covid that were barely worn and hanging in the closet for five years.