Rust/corrosion or coolant/antifreeze

All four floorboards are wet and when I pressed my hand to the carpet to feel how wet, now my hands are stained orange. Could it be rust/corrosion or coolant/antifreeze? I just purchased this car last night. It has been raining in our area for several days, including last night and today. I took all the floor mats out to see if the carpet would dry, but they haven’t. I did not realize the issue until I got the car home. I brought it back to the dealership today. They have it in their service department now.