If lightning struck your house, a dangerous surge of electricity could zap through the electrical, phone and cable lines in your house. If you were talking on the phone or typing on the computer, you could get a nasty shock!
The best way to prevent dangerous power surges from lightning or when the electricity comes back on is to unplug all the electronics and big appliances during a storm.
If the lights go out
Many people use candles when the lights go out - but candles can be very dangerous if they're not used the right way. Many fires happen during storms because a candle tipped over. It's much safer to use battery-operated flashlights from your storm safety kit instead.
During winter storms, it might seem like a good idea to turn on the gas stove to keep warm. But this very dangerous because it can lead to carbon monoxide poisoning.
If the power is out for a long time, the grown-ups in your house will probably be worried about the food in your stove or refrigerator.