This whole thing about the truck drivers not showing up causing delays at the port really stuck in my brain as it just didn't make sense to be the main bottleneck. The dock workers and hospital workers showed up fine. Many of the roads were clear enough, but still the cargo sat there. No doubt trucks were damaged, but not 80% of them. Then I thought about how it would work without electricity or communication systems.
My theory:
The bottom line is that a modern supply chain doesn't function without electricity. It barely limps. There is just no way to order, move, receive, store, and sell efficiently without it. Further, if the big grocers and pharmacies do not have any cool storage at 40 degrees or less, then those containers won't be picked up. If it's 90 outside, how hot are those buildings right now without a/c? Food and medicine will stay where it is. No trucks will come. Same for the distributors. Everyone along the line needs power and the power requires a stable supply of diesel. The port has it, so that's where they remain. There is no 'normal' functioning area nearby to put it or pull from like Texas and Florida had. The workarounds are so limited. (I'm sure FEMA can work around it, but these thousands of containers are not FEMA)
They could patch up the communication with some effort, but without diesel to run generators for electricity, they aren't opening up for business and, therefore, no reason to send the trucks.
Having electricity, but no communication systems up, they would need to be 'cash only' which at this point may require armed guards for a large store. Even just giving it away may start a dangerous riot they aren't prepared to deal with. They need FEMA and military help for that.
So now you have all these businesses and hospitals requiring millions of gallons of diesel over an extended period, this sudden brand new demand, and not enough fuel trucks or drivers to bring it to them. They don't have the capacity for it.
FEMA and the military cannot provide for everyone on that island. Their best bet is to try to piece the system back in place ASAP and supplement the gap. Oh, and bring in their own trucks and drivers too.
What a mess!