Many people have no running water. And if they do, it can't be consumed without boiling.
There's no electricity in many regions.
Supplies are scarce.
I've written about the SHTF aftermath in Puerto Rico, both the day after the storm, a week after, and a couple of months later. But while there is a lot of good information in all those articles, it's just words on a page.
The video below brings it to life. This is what life looks like for people who have just watched everything be turned upside down by Mother Nature.