Hurricanes and tornadoes are both powerful storms that can cause damage. Hurricanes form over warm tropical waters and gain strength from moisture and wind convergence. They are categorized based on wind speeds and can be over 500 miles wide. Tornadoes form from thunderstorms and wind shear, have narrower widths, and last only a few minutes though some may be over a mile wide. Both storms require safety precautions like sheltering indoors away from windows.