After a very long road trip, I noticed that the rear wheel well liners had come in contact with the rear tires. The contact was severe enough and prolonged enough to wear down the edge of the tires to the cords. Once I noticed the damage, I stopped driving the vehicle until I could get new tires. I do not have the tires but I took pictures and the wheel well liners still have a hole in them. Had I not noticed the damage, a catastrophic failure of the tire could have resulted with unknow consequences to myself or those driving near me. The wheel well liners did not come loose or detached from the vehicle. They somehow flexed forward and made contact with the tire. The tire/wheel did not flex or move rearward. This would have required major damage to the suspension of the vehicle and the vehicle would have been undrivable. My assumption is that with the very wet road conditions, the wheel well liners became very flexible but not enough to contact the tires. At highway speeds, due to the air flow around the vehicle, it appears that the lower quarter panels flexed inwards. This allowed the now flexible wheel well liner to flex forward, due to air pressure behind the wheel well liner, and make contact with the tire. Tire tires involved are not the stock make and model but were the stock size. I will be adding a small aluminum strip to the bottom of the wheel well liner to prevent this from happening in the future.