Be Aware of Thunderstorm Hazards: Severe thunderstorms
can produce dangerous winds, hail, and lightning. In addition, they
can cause flash flooding in rivers and streams, dry gulches, and in
low-lying places in cities and towns.
If You Can Hear It, Clear It; If You Can
See It, Flee It: This saying means that you should take shelter
if the time between a lightning flash and the thunder is 30 seconds
or less, which means that the lightning is about 5 miles away. (To
determine the distance, count the seconds between the flash and the
thunder and divide by 5.) The safest shelters are indoors or in a
vehicle. Lightning can strike 5-10 miles ahead of the storm, so don't
wait until the lightning is upon you to go inside. Don't resume activities
until 30 minutes after you hear the last thunder.
Indoor Lightning Safety: Stay away from
windows, electrical equipment, and metal objects. Don't take a bath
or shower and don't use the phone. Turn off unnecessary electrical
equipment (such as TVs, computers, and air conditioners).
Outdoor Lightning Safety: Seek shelter
indoors or in a car. Stay away from single tall objects (such as a
tree) and metal objects (fences, pipes, rails). Don't hold golf clubs,
fishing poles. Remove backpacks with metal frames. It is not safe
to be riding bicycles, motorscooters, motorcycles, or golf carts.
If you are out in the open and cannot get to shelter, stand in a low
spot under a group of trees (not under a lone tree) or crouch down
on the balls of your feetdo not lie flat on the ground. If you
are swimming or boating, get out of the water.