Mother Nature’s Electricity: Lightning
Lessens your chances of being struck indoors during storms by staying off corded phones, the use of a cell phone or cordless phone is fine as long as they are not attached to a charger. Stay off of computers or other appliances directly connected to electricity. When in doubt unplug your computer or other electric appliances to ensure them not being struck by a random bolt of lightning.
In addition to direct strikes, lightning generates electrical surges which can damage equipment far from the actual strike. Typical surge protectors will NOT protect your equipment.
There are 3 most common ways lightning can enter your building, first is a direct strike, secondly through wires or pipes that extend outside the structure, and lastly, through the ground. Once inside lightning can travel through the electrical, phone, plumbing and electronic reception lines. It can also travel through the metal wires or bars that reinforce concrete.
The best way to stay safe from lightning is to avoid the threat. Simply put, stay indoors in a safe shelter. A safe shelter from lightning is either a substantial building or an enclosed metal vehicle.
A safe building is one that is fully enclosed with a roof, walls and floor, and has plumbing or wiring. Examples include a home, school, church, hotel, office building or shopping center these buildings are more likely to provide the grounding needed to handle a direct lightening strike. During the storm turn off and unplug radios, corded phones and computers. The surge caused by a lightning strike can destroy these electronic devices.
Unsafe buildings include car ports, open garages, covered patios, picnic shelters, beach pavilions, golf shelters, tents of any kinds, baseball dugouts, sheds and greenhouses.
A safe vehicle is any fully enclosed metal-topped vehicle such as a hard-topped car, minivan, bus, truck, etc. While inside a safe vehicle, do not use electronic devices such as radio communications during a thunderstorm. If you drive into a thunderstorm, slow down and use extra caution. If possible, pull off the road into a safe area. Do not leave the vehicle during a thunderstorm. Unsafe vehicles include golf carts, convertibles, motorcycles, or any open cab vehicle.
For more information about lightening safety visit: http://www.lightningsafety.noaa.gov.