I was a contract FEMA inspector after Katrina and Wilma. Also on an SBA Federal Disaster Recovery team in Iowa, Upstate NY, Hurricane Ike and plenty of other Presidential declared disasters.
First know how deep the water was. In some parts of hurricane surges, people drowned in their attics. Assuming the water was less severe, look in the water heater closet for the water mark. Rising water seeks it's level through out the neighborhood - ask 2 or 3 (or 10) other owners. Wall plugs are at 12 inches. Floor heat, crawl space, hardwood floors, AC units on pads are all considerations. Drywall needs to be stripped out and comes in 4x8 sheets. if the damage is less than 4 feet, strip out the drywall to 4 feet and start there. Heavy flooding can bring settling and structural problems. Don't miss Kitchen cabinet replacement. Mold and mildew are almost a given.
Seepage can compromise basements, windriven rain can cause incredible roof damage.
Unless you have deep pockets, are in your investment for the cleared land costs, are a licensed General Contractor or have magic powers, consider alternative investments, upsides and ROI. Post Disaster, the wind and flood maps may be redrawn and re-rated for insurnce. Can you even rebuild? what will the RE market look like? Do you have schools, jobs, services, neighbors?
I was in Slidell, LA after the BP Oil Spill and they just dedicated their new high school, 5 years post Katrina. Bolivar Pennisula, TX is rebounding, albeit completely different from pre-Ike 13 years ago.
In the Flip side, housing that can be put back in service quickly, may be renting and selling at above market with premiums due to so many residences lost or off-line.
I don't know your situation or risk tolerance, but be aware, be informed, be successful. Good luck.