There is an entire network of volunteers in place. FEMA has a link on their website.

If you want to volunteer, FEMA isn't stopping you. Your efforts need to be coordinated or you end up working against recovery rather than for.

HAS NO ONE ELSE BEEN THROUGH A DISASTER BEFORE?

(That's my rant) 

 @LostInCalifornia Grenfell fire. People died because of institutional mistakes, and actual neglect, it just brings out the "sounds about right" in the people at the bottom, emotional response to someone saying it's happening again somewhere else.