If you come home from work after a bad rainstorm and find inches of water in your basement, you should immediately call a company that offers emergency water removal services. Getting the water out of your house fast is the ultimate goal in minimizing damages, but you must also find out why the water got inside your house. If this much water came in, there is a definite problem that must be fixed to prevent this from happening again.
If you've already had a water damage restoration company clean up after a basement flood-- including replacing the flooring and other furniture if it was too damaged to be restored, you will still need to be on the lookout for signs of mold and mildew growth, especially if you live in a humid area. You don't want to have to call a remediation company again after you've just gotten everything fixed.