A couple questions?

Okay so I just finished the last episode and am not sure what to think. I feel as though a couple important points weren't clarified:

The canned food and water: The understanding at the time was that they had run out of water, but the investigators saw shelves full of supplies. Were those brought in after? Or missed at the time? Were the people in the hospital truly making decisions believing that they had no supplies?

Were evacuation operations fully ceasing? - They were ordered out and told that support/protection was being withdrawn. No more boats would be coming after 5pm and the helicopters doing the evacuating couldnt fly at night. But could the efforts have picked up in the morning? Could staff have chosen to stay