ShutterstockNuclear blasts create fallout, which can harm you with large doses of radiation.Cars offer little protection from fallout.A surer way to survive in the aftermath of a nuclear explosion is to go indoors, stay put, and listen to the radio.The first thing you'd see if a nuclear bomb exploded nearby is a flood of light so bright, you may think the sun blew up.Wincing from temporary blindness, you'd scan the horizon and see an orange fireball.