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Thunder is the sound produced by the rapid expansion of air along the lightning strike. Safety Tips: Use the '30-30 rule' - if time between lightning and thunder is less than 30 seconds, seek shelter and wait 30 minutes after hearing the last thunder before leaving cover.

Lightning can cause power surges and damage electronic systems and appliances. Safety Tips: Use surge protectors for your electronics and unplug valuable appliances during a storm to prevent damage from a power surge.

While the odds of being struck by lightning in a given year are low, it can cause serious injuries and even be fatal. Safety Tips: If someone is struck by lightning, call emergency services immediately and begin CPR if they are unresponsive and not breathing.

There are various types of lightning including cloud-to-ground, cloud-to-cloud, intra-cloud, and positive lightning. Safety Tips: All types of lightning can be dangerous; always seek shelter during a thunderstorm to minimize risk.

Lightning can reach temperatures of approximately 30,000 Kelvin, which is hotter than the surface of the sun. Safety Tips: Such high temperatures mean lightning can cause fires and severe burns; avoid open fields and tall objects that can attract lightning.