When you come up to an intersection you should always leave your wheels pointing straight ahead until you start to turn into the intersection, i.e. as you start moving forward to make the turn into the intersection, turn your wheels. Don’t turn your wheels while you are stationary as this wrecks your tyres, and definitely don’t sit with your wheels turned otherwise you’ll see what can happen in the video below.
The driver was waiting to turn across traffic with his wheels turned. Someone hit him from behind which then pushed him into the path of the oncoming truck. If he had had his wheels straight, he would have just been pushed forwards.