Thunderstorms can bring heavy rains (which can cause flash flooding), strong winds, hail, lightning and tornadoes. In a severe thunderstorm get inside a sturdy building and stay tuned to a battery-operated radio for weather information. Severe thunderstorms can strike at any time of the day or night. The heaviest volume of severe thunderstorms occurs from April through September.
Lightning is a major threat during a thunderstorm. In the United States, between 75 to 100 Americans are hit and killed each year by lightning. If you are caught outdoors, avoid natural lightning rods such as tall, isolated trees in an open area or the top of a hill and metal objects such as wire fences, golf clubs and metal tools. If you are swimming, get out of the water and seek shelter. If boating, return to shore. Inside your home; keep away from windows and doors, avoid use the telephone unless there's an emergency and don't use electrical appliances.
If you see wires on the ground, DON'T GO NEAR THEM! Downed wires may be "live" and extremely dangerous. If you see downed wires, call your local electrical provider.
It is a myth that lightning never strikes twice in the same place. In fact, lightning will strike several times in the same place in the course of one discharge.
While thunderstorms and lightning can be found throughout the United States, they are most likely to occur in the central and southern states.