If you're driving down a road where the posted speed limit is 30 mph, and notice that a tornado touches down ahead of you and doesn't seem to be moving but is gradually getting larger and larger -- which means it's moving directly towards you, and your choices are:
driving towards the tornado
staying where you are, and letting the tornado catch up with you
driving 65 to 70 mph away from the tornado in a desperate attempt to escape
I think driving 65 to 70 mph to get away from the storm would not be considered "a sin".
Or, you can do what my uncle did, and leave the safety of your car and home to catch this picture:
His house was the one to the left. It wasn't hit, but this particular pair of tornadoes killed 72 people.