The contact owns a 2019 Jeep Wrangler. The contact stated while driving approximately 35 MPH, the water temperature gauge rose and failed to return to a normal engine temperature. The contact pulled over to the side of the road and became aware that the third reservoir tank was empty. The contact waited until the engine had cooled down, added coolant, and then continued driving the vehicle. The contact became aware of coolant leaking around the water pump. The dealer was informed of the failure however, the contact had not heard from the dealer. The vehicle was not taken to the dealer to be diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was unknown.