by: Bong Barrameda, Pinoy Trivia Vol. 3
A. 20
For the Record. You can determine how far away a thunderstorm is without using any special instruments. First, wait for a lightning flash. Then count the seconds that pass until the sound of thunder is heard. Sound travels about 1 mile (1.6km.) in five seconds. Thus if there are five seconds between the lightning flash and the thunderclap, the storm is about a mile away. If ten seconds pass, it is 2 miles away, and so on.
A Friendly Reminder. If you are driving during a thunderstorm, stay in your car. It is one of the safest places to be. If lightning does strike, it will flash over the surface of the vehicle - which is virtually a metal cage - and run harmlessly to the ground. If you're on foot in the wilderness, do not take cover in cave mouths, rock-face overhangs or recesses under boulders. They create spark gaps across which lightning can arc on its way to earth, striking anyone there. However, a deep cave is safe haven as long as you go right to the back.
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