The answer to 'why is my floor water damage' is that there are several common causes, including leaks, floods, spills, and high humidity. Symptoms can include warping, cupping, cracking, or discoloration of the flooring. Solutions depend on the severity and cause of the damage.
For minor water damage, you may be able to DIY by drying the area, cleaning, and making small repairs. However, for more extensive damage or if the cause is not clear, it's best to call in a professional cleaning or restoration company. They can properly diagnose the issue, extract any remaining water, and determine the best course of action to restore your floors.