During a Thunderstorm
All thunderstorms produce lightning that can cause death or serious injury. Lightning can strike from up to 5 to 10 miles away, even if it is not raining or is sunny where you are. If there is a thunderstorm warning, or if you see or hear a storm coming in the distance, follow these steps:
Get inside a home, building, or vehicle right away.
If you're outside, drop to a crouching position with your feet on the ground and close together.
Stay away from trees, metal objects, and power lines, and do not use appliances such as phones, televisions, or computers that could carry the lightning current into your home or office.