Answer:
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. ... Lightning strikes during thunderstorms kill more Americans each year than either tornadoes or hurricanes.
Explanation:
Thunderstorms always have lightning (thunder is caused by lightning, and you can't have a thunderstorm without thunder!), but you can have lightning without a thunderstorm. Lightning can also be seen in volcanic eruptions surface nuclear detonations, and in heavy snowstorms (“thunder snow”).
