Hazard Knowledge

Lightning may strike structures or objects and cause a collapse or start a fire. Personnel working in exposed or unsheltered locations may be at risk of lightning strike during thunderstorms. Working at height or on, in or near water may increase this risk.

There are three different ways of being struck by lightning:

• Direct strike
• Side flash - the lightning hits another object and arcs
• Ground strike – the lightning strikes the ground then travels through it

Tall metal structures, such as transmission towers, can conduct lightning to ground or lead to arcing from the object to equipment or personnel. Carrying conductive equipment may increase the risk of lightning strike.