People need to find out where the pantry;s are located and distribution areas....too many want front door service!
If your son in Puerto Rico was to help at those centers there won’t be any issue of food.
When I was young trying to make it on my own I took a job at a small diner weekends while I looked for work during the week.......guaranteed I would eat!
My son has a small building contracting company and his specialty is in electrical including installing generators. I suspect he will be able to barter for food and more.