Every thunderstorm contains lightning. You do not have to be directly under the cloud to be struck. Follow the 30/30 Rule - the first 30 means you need to take cover if you hear thunder within 30 seconds of seeing the lightning; the second 30 means you should wait at least 30 minutes after the last lightning flash or thunder clap to resume outdoor activities.
If you can see or hear a thunderstorm, take cover in a house, large building or automobile.
Stay away from lakes, streams and rivers. If you are boating or swimming, get to land immediately.
Stay away from all metal objects such as fences, power lines, bicycles, farm equipment, water faucets, bathtubs, etc.
Stay away from high places, open fields, isolated trees and tall objects such as flagpoles, towers, bleachers, etc.
Avoid using the telephone except in an emergency.
If caught in an open area without shelter, go to the lowest area, such as a gully, drainage ditch or depression and lie down. Be alert for flooding in these areas.
If you feel your hair stand on end, drop to your knees immediately, bend forward and put your hands on your knees. Do not put your hands on the ground. Do not lie flat on the ground.