You can die of lightning if you have been struck near or in the heart or in the head. If it strikes you in the foot, you probably won't die. But, sometimes it also depends on your health condition. It also depends on how hard the lightning struck you or how long it lasted. Because lighting is very hot. Sometimes, it just happens that you won't die. Or you will die even if it didn't hit you hard, it wasn't long, your health conditions aren't bad and it didn't hit a vital organ.