From what I've seen, the problem is more likely getting word out and getting around the island. I don't think supplies can be delivered door to door and are more available at the shelters. I've seen many posts that say the Airport has water..etc.

But it is clear the disaster management there needs a serious overhaul. This is a significant event, but the lack of communication is quite awful. Areas really should have been broken up and a team leader assigned to each with people checking in daily, getting updates..etc.