Water Pump Basement Flooding - There are several approaches to help prevent moisture damage issues in a cellar. The first guideline is no dirt basements. Though these are somewhat less common in this day in age, it is good to point out that dirt flooring not only hold a huge amount of moisture but also can give off a variety of gases. When building a cellar, make sure you have a floor drain with a trap installed in the lowest point of the floor.
With no floor drain, any water that is spilled inside can't get out. If needed, install a sump pump and make sure the sump cover is tightly sealed. Sump pumps are usually used where flooding due to a high water table might be a issue. Additionally, waterproof the outside of the base walls and install a perimeter drainage system. An often overlooked problem in basements is moisture that comes out of humidity.
The easiest way to control humidity would be to exhaust water vapor produced in the house to the outside. Indications of high humidity comprise condensation on walls, pipes or other surfaces as well an overall awareness of moisture from the air, dampness, and smells. Often, the humidity is going to be caused by exposing the cellar to outside air (open windows), having wet laundry hung to dry from the cellar, keeping firewood from the cellar, and/or a drier vent that exhausts inside.
In hot, humid weather, maintain cellar windows closed. The key to keeping basement humidity would be to keep them well ventilated and to keep additional moisture out of the cellar.