Avoid using the telephone or other electrical appliances until the storm passes. If outdoors , seek shelter immediately. If you can hear thunder, you are probably close enough to the storm to be struck by lightning. If you are in a boat when a thunderstorm threatens, you should attempt to reach shore as quickly as possible. If you are driving, pull safely to the shoulder of the road away from trees and power lines.
Lightning can bounce from trees or power poles into a vehicle through the radio antenna.
If you find yourself in a position where there is no immediate shelter available, find a low spot away from trees and power poles where you can squat low to the ground. Make yourself the smallest target possible. Check for injured victims. Render first aid if necessary. Do not attempt to move severely injured victims unless absolutely necessary.