After a tornado, the wreckage left behind can pose additional risks. This is because the tornado can cause extensive damage to buildings, infrastructure, and other structures, leading to unstable and unsafe conditions. The wreckage may contain sharp objects, exposed wires, and other hazards that can cause injuries. Additionally, there may be gas leaks, downed power lines, and other dangers that can increase the risk of accidents and injuries. Therefore, it is true that the wreckage left behind after a tornado can pose additional risks.