We lost everything in the fires in January.
FEMA definitely helps in the immediate aftermath. Just stick with them. They will follow through, it just takes time. All the agencies that are meant to help right now are dealing with shakeups.
SBA Disaster loans are HUGE for people that need to rebuild/relocate. You can get loans to help at 2.56% over 30 years. Can't stress how helpful that will be for the recovery. And yes you can use it to relocate.
Obviously, now is the time to find those that are missing and make sure everyone's immediate needs are met. But if you have friends dealing with the loss of a home, share this site with them: https://uphelp.org/ I know flood insurance is treated differently than other calamities, but that website will be one of the most helpful things you could share over the next 2 years for them. It has step-by-step roadmaps for recovery. It's a non-profit run by survivors of disasters.
Also, offer to babysit their kids for free while they talk with their spouses about what the fuck they're going to do. Recovery is like having another full time job.