An area of rotation, 4-10 kms wide, now extends through much of the storm. Most strong and violent tornadoes form within this area of strong rotation. If you are inside, Stay inside with doors and windows shut and stay away of these windows and exterior walls. As a last resort, hang on tightly to the base of a shrub or small tree. Do not stay in vehicle and do not drive to outrun it if you feel that it is too close or you are unsure.
Most people actually drive into the path.
If, possible, run to nearby solid building. Protect your head. Do not go under bridge overpasses, they are not safe locations as winds funnel into these areas and offer little protection. In addition, the worse threat from tornadoes in flying debris and underpasses offer little or no protection to this. Thunderstorm detection at Environment Canada Weather radar is a prime tool of Environment Canada in detecting heavy precipitation, rapidly developing cloud systems, and other signatures of severe thunderstorms.