What happens when lightening hits water?

The lightning current is likely to radiate across the surface. Various different estimates have been given for the distance over which it would dissipate to the point where it would not be a harmful to a person. read more

When lightning strikes the surface of water, the discharge spreads out, forming a generally circular, radiating branching network of air sparks across the water's surface - a Lichtenberg figure-shaped pattern. read more

An almost identical “lightning bolt” can be seen flashing across the water at the 1:30 mark: While we do not advise hopping into an outdoor pool during a raging thunderstorm, we can assure you that should you disregard that advice and lightning strikes during your swim, it may be exceedingly unpleasant — but it won’t look like these videos. read more