There is a power steering leak.
Power steering leaks are not uncommon. There are a few places the power steering fluid can leak from: hoses, steering rack, and power steering pump. Getting the power steering leak diagnosed and repaired quickly would be in your best interest. If the leak goes unaddressed, it can cause the entire power steering system to fail and a loss of power steering. I would have a qualified technician, such as one from YourMechanic, detect the power steering fluid leak and make the needed repairs.