After the flood, it's the mold, mildew, and other bacteria that must be taken care of as soon as possible. Experts recommend taking care of the problem within 24-48 hours. Sooner is better than later, but no matter when you decide to get it done, be smart. Use masks and gloves to protect yourself. Get old flooring and walls out of the house and hauled off to the dump.
There are professional services to help out:
But also do-it-yourself techniques: