Assess the amount of water in your basement. A small amount of water can be cleaned with a mop and dried with towels. For a large amount of water, use a wet vacuum or sump pump to suck up the water. Once all the water is gone, the basement floor needs to be dried so mildew or mold does not form. Open the windows and turn on the heat; failure to do both will result in the production of humidity. Fans turned on and positioned out of the room will speed up the drying process. After the basement is dry, clean and sanitize any areas from mud or sewage as needed.
Hub Pages: How To Clean A Flooded Basement