I have dealt with large claims on both floods and hurricanes. If you have a wind claim, you are facing high deductibles. If you have flood insurance, and are dealing with a flood claim there are very low deductibles.
If you have flood damage you need to take pictures, and quickly remove the saturated contents, carpet, drywall, insulation, etc... The adjusters are going to balk at mold, because of exclusions in the policy. If you let it sit mold will start growing within days.
You need fans and dehumidifiers going. If there is no power, the insurance companies cover the cost of generators.
I recommend having a representative review and negotiate your claim, and your contracts with contractors. Take the number the insurance offers, and you lose. Let the contractor handle all of the negotiations, and you will likely lose. Be smart and savvy, on both sides, and you can come out ahead.
Insurance wants the minimum payout. Contractors want the maximum profit. You want to maximize your claim and negotiate a contract that will include some extras. Also, don't let the contractor get ahead on money, you need to make sure you pay for work completed.
Make sure you retain leverage in all scenarios.