Winds of 200-300 mph can occur with the most violent tornadoes. Wrap yourself in overcoats or blankets to protect yourself from flying debris. Stay away from glass enclosed places or areas with wide-span roofs such as auditoriums and warehouses. Crouch down and cover your head as shown in the right figure. Stay away from exterior walls or glassy areas.
Most deaths occur in cars and mobile homes.
If you are in either of those locations, leave them and go to a substantial structure or designated tornado shelter. Lie flat in the nearest ditch or depression and use your hands to cover your head. Avoid small rivers or streams, low spots, canyons, dry riverbeds, etc. Even if it looks shallow enough to cross. The large majority of deaths due to flash flooding are due to people driving through flooded areas.