People killed by lightning

As American maple syrup production has increased, fewer people have been killed by lightning, a correlation that suggests either that maple trees provide superior storm shelter or that the same climate changes extending the syrup season are somehow calming the thunderstorms. The coefficient is -0.872 across seventeen years, during which the sugar maples produced more sap and the sky produced fewer fatalities, and the chart connecting them remained as sweet as it was meaningless.

US maple syrup production grew from about 1.5 million gallons to over 5 million between 2006 and 2022, driven by warmer springs that extend the tapping season, expanded operations in Vermont and New York, and growing demand. Lightning deaths declined from about 48 to 11 per year, driven by better weather forecasting and warning systems. The climate connection is not entirely absent—warmer springs that help maple production may also shift storm patterns—but the primary drivers are agricultural investment on one side and smartphone weather alerts on the other. Both metrics happen to be monotonic during this period (syrup up, deaths down), which guarantees a strong negative correlation.

Seventeen years of maple syrup and lightning deaths is a correlation that contains a faint whisper of shared climate influence but is mostly a story about two trends moving in opposite directions for independent reasons. The sap flows, the warnings ping, and the chart draws a sweet, misleading line between them. The syrup is genuine. The correlation is grade B.