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One element that might help you determine whether or not you're in a thunderstorm is lightning. Lightning, which is a bright flash of electricity, is always produced during a thunderstorm. Lightning is very dangerous because of its 6 times hotter than the sun! But just because you see lightning doesn't automatically mean that its a thunderstorm. You don't have to be in a thunderstorm to see lightning. Another danger of thunderstorms is hail. Hail is a form of precipitation that rains down balls of ice. Thunderstorms don't always contain hail, but it is one very destructive element of the storm.

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In the daytime, the land heats up faster than the sea does, so the air above the land heats up and expands. After it's expanded, it rises up into the atmosphere where its cooler. The air cools down and condenses into a cloud, which in turn creates precipitation and lightning.

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Thunderstorms form over land in hot, humid areas in the summer. Convection currents play a key role in creating thunderstorms. When a convection current forms and the warm air rises, it goes really high into the atmosphere and starts to cool down. After the air has cooled down and condensed into clouds, it starts to get really heavy. Once the cloud gets too heavy, precipitation will start to come in either the form of rain or hail.

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If you're outside during a thunderstorm, your first step should be to find shelter inside a house, large shelter or hard metal vehicle. Avoid hiding near tall trees and telephone poles and try to find a shelter with a solid roof. If you can't get inside and the hairs on your arm start to stand up, there's a good chance lightning is about to strike. You should get on your hands and knees and tuck in  your head. If you're  able to find a shelter, once you're inside you should find an emergency  radio and listen to it until officials say that its safe to go outside again.  But if you still don't feel safe, another option is to listen to the last thunderclap and wait 30 minutes.