There many be minuscule holes in the floor or walls that are leaking water. If they are not visible, it may be because they are underneath or behind furniture.
It's colder in the basement than the water coming in the pipes. Seal up the vents and drafts in the basement. Wrap the pipes
cover it
You can have a dehumidifier AND a sump pump, and still have water in the basement. A dehumidifier helps decrease the humidity due to the lack of ventilation in a basement. A sump pump facilitates drainage of water, as a basement has no natural drainage. Neither prevents water from coming into the basement through the walls or the seams of the floor and walls. If you have problems with water coming into the basement, consult a professional who can advise you of the cause and explain the options to remedy the matter. Neither a dehumidifier nor a sump pump will totally insure a waterproof basement. Dehumidifiers simply remove dampness. Sump pumps do not remove damnpness but will drain off water.
Are they blind?
Usually in basement coming through wall about 4 feet down from top of basement wall. The wall where water supply comes through at is usually in line with well or curb stop.
I have a water leak under slab cement down in my basement. It is always damp and dank down there. I can't point out where it's coming from. It seems to be random where the water comes up. What do I do?
To water proof your basement, use Guardian Seal Basement Waterproofing.
Where you should go in your basement does not depend on where the tornado is coming from, but how the house and basement are arranged. You will want to be away from windows and preferably in a corner. If there is a small room within the basement, the walls can add protection.
Usually not.
stoppage / broken water line /under ground seepage
One of the best ways to avoid water in the basement is to avoid water outside of your house as it may sink in through cracks and holes in the wall and into your basement.
Install a Backwater valve