That's not unique to this hurricane situation. The prices that come up on a search (google, Travelocity, etc) are never "available" when you try to book.
Last week I searched for a room in Flagstaff AZ. Search showed rooms at $89....the lowest actual was $128
You can’t find any rooms in Flag this time of year under $100..tourist season
Odd...I’m always able to get a room at the posted price.