Why are lightning storms are so dangerous ?

During the lightning storm, the electric field developed is on the verge of causing an electrical breakdown in the surrounding air. Therefore, lightning storms are dangerous, because of :

(i) If lightning strikes us or something we are touching, it produces a fatal charge flow in our body.

(ii) If lightning strikes any object near us, a portion of the charge flow may jump to us through the air.

(iii) If lightning strikes the ground near us, a part of the charge flow along the ground to our body.

(iv) Sometimes, negatively charged base of an overhead cloud result in the movement of some of the conduction electrons in our body into the ground, leaving us highly positively charged. This would produce an upward streamer, which is dangerous because the
resulting ionization of molecules in the air sets free, a tremendous number of electrons from those molecules.