Cars generally provide protection for humans against lightning strikes and other types of externally generated electricity, according to the National Weather Service. However, cars provide no protection against electrical sources coming from within the car.
The car's metal shell provides strong protection for its occupants against electricity. While many people believe that rubber car tires keep occupants safe, it is actually this metal shell that prevents electrocution. Lightning generally strikes the antenna or roof of a car, the NWS states. However, lightning strikes can create a significant amount of heat and cause fires. Lightning also can ruin a car's electrical system or shatter windows, potentially rendering the struck car inoperable.