People killed by lightning

As more US counties have reported good air quality days, fewer people have been killed by lightning, a correlation that suggests cleaner air somehow calms the storms, or that the same government agencies monitoring air quality have found a way to redirect thunderbolts. The coefficient is -0.885 across seventeen years, during which the air got cleaner and the lightning got less lethal, and the chart connecting them remained serenely confident in a relationship that almost certainly does not exist. The sky clears, the body count drops, and statistics takes the credit.

Lightning deaths dropped in 2020 for the same reason most weather fatalities did — fewer people were outside doing the kinds of things that expose them to the sky — while good-air-quality days spiked because lockdowns idled so much traffic and industry. Two different ways the sky behaved differently in the year the ground went quiet.

Seventeen years of cleaner air and fewer lightning deaths is a story about a nation that is getting better at both environmental regulation and weather survival, for entirely separate reasons. The air improves because of policy, the deaths decline because of warnings, and the correlation between them is simply two forms of progress sharing the same timeline. The sky is clearer, the forecast is louder, and both are saving lives.