The crown of a tree is what catches the force of storms. When wind catches the crown, it can cause limbs to fail and break off or the tree itself to uproot. Crown reduction can reduce the possibility of such damage. The top of a tree acts as a sail, especially when in leaf, and when the wind blows the crown catches the wind. We also recommend crown-thinning, which minimizes the damage caused by high winds, especially to trees which are in good vigour.