There’s no supply to attract. That’s part of why they get to charge extra, there’s a natural disaster, they’re cut off, replacement supplies are NOT on the way. As soon as the supply lines are open again then the prices have to go back to normal because they’re no longer cut off.
Are you saying there is no bottled water in any of the adjacent states?
If there are reasonable opportunities to make money, entrepreneurs will fill the vacuum. When several show, competition will drive down the price. This is how free markets work, even in the aftermath of a natural disaster.
It has been this way since the dawn of civilization. On the other hand, Marxist central planning and government control stifles the free market.