ChanieE, there are two issues; ethics and PR.
Ethically, some say it’s fine to charge what you can, and some say it’s unethical to take advantage of a disaster this way.
I think even the second group would agree that if the higher prices are due to higher cost of obtaining the goods, not just because they can get it, that’s ethical.
PR wise, that may or may not fly, depending on how it’s presented to the customers.