nature & planetanalysisThe Conversation

Lightning strikes kill thousands globally each year, but for those who survive, the storm is far from over

the gist

An estimated 6,000 to 24,000 people are killed by lightning each year, and the true figure is uncertain because records are incomplete. Central Africa is one of the most lightning-active regions on Earth, with roughly 2 to 4 million strikes a year across the continent, fed by warm moist air from the Gulf of Guinea that is forced upward over highlands. Most lightning deaths in Africa involve more than one victim, unlike in developed countries, and about half of African incidents happen indoors in buildings without lightning protection. Survivors often develop invisible injuries such as memory loss, chronic pain, tinnitus and nerve damage, and many doctors have little training to treat them.

so what

Lightning kills far more people in some regions because of building design and weak protection, not only because of how often storms occur. Recognizing long-term injuries also matters, since most survivors have no visible scars.

more on this

background

A lightning strike or lightning bolt is a lightning event in which an electric discharge takes place between the atmosphere and the ground. Most originate in a cumulonimbus cloud and terminate on the ground, called cloud-to-ground (CG) lightning. A less common type of strike, ground-to-cloud (GC) lightning, is upward-propagating lightning initiated from a tall grounded object and reaching into the clouds. About 25% of all lightning events worldwide are strikes between the atmosphere and earth-bound objects. Most are intracloud (IC) lightning and cloud-to-cloud (CC), where discharges only occur high in the atmosphere. Lightning strikes the average commercial aircraft at least once a year, but modern engineering and design means this is rarely a problem. The movement of aircraft through clouds can even cause lightning strikes.

From Wikipedia: Lightning strike (CC BY-SA 4.0) ↗ · text CC BY-SA 4.0

Illustrative photo · Friedrich Haag, CC BY-SA 4.0, via Wikimedia Commons