Tornadoes bring massive winds, creating mass destruction to many areas across countries every year. 
1) Have a tornado emergency plan: safe shelter, emergency kit that has batteries, battery operated torchlights, medication, water and non-perishable food like biscuits.' 
2)Stay aware of weather conditions: Stay tuned to local radio, TV stations or to NOAA weather radio on updates of the weather outside 
3)Know where to shelter and where NOT TO SHELTER during a tornado: 
 Avoid mobile home 
Avoid windows 
Head to the basement or the lowest floor room without windows 
Hide under something sturdy like a heavy table 
 Source: CDC.gov