Cleaning the basement is not an easy or appealing thing for most people. This is so common that professional cleaners are a dime a dozen these days. A lot of work goes into cleaning up the average basement, which is the functional backend in most homes. Expect in places with drier climates, the main issue that needs dealing with is moisture damage and mold damage. Sometimes you would also need to deal with the causative waterlogging.
Basement cleaning services can calculate the extent of both, after which the crew would proceed to pump put the water in the basement. This requires some specialized equipment, which the professionals would have with them. That makes this option a lot easier than getting all the stuff and learning how to use it yourself.
First, the water is pumped out. This needs to be done very slowly because if the pressure builds on the outside and basement pressure drops, it is not safe for the building structure. The basement walls could fall in even, so this needs to be handled carefully. This is another reason to hire basement cleaning services.
After the water has been removed fully, damages need to be assessed as a function of the time the water was inside. The professionals providing basement cleaning services could help out with determining if the floors, carpets, etc. can be salvaged. This falls under the area of moisture damage recovery.
You would also need to address any mold growing in the basement, as a result of water and moisture. If such areas are found, basement cleaning services can take care of it for you as well. Make sure you hire the best you can afford because the work they do here can affect the structural stability of your home.
They will make use of equipment that you could not viably hire or purchase yourself. And as mentioned already, they would take some time learning to use. Let the professionals handle this. Leave the use of water extractors and dehumidifiers to them, and stay focused on getting the salvaged items out.
This was on how to deal with the recovery of a flooded basement in your home. Not all of the staff would make it out undamaged, so do not hold out any hopes for that. Be comforted by the knowledge that the cleaning will definitely help the life span of the structure.