Eiffel Tower Grows 10 cm Amid Heatwave and Lightning Strikes in Paris

During a recent intense heatwave and thunderstorm in Paris, the Eiffel Tower was struck by powerful lightning bolts, astonishing tourists as the iconic structure appeared to grow by 10 centimeters. This phenomenon occurred amid Europe’s extreme heat, with temperatures reaching 40 degrees Celsius and causing over 1,300 excess deaths across the continent since June, while Paris hospitals face strain.

The Eiffel Tower, made of processed iron, is highly sensitive to temperature changes due to thermal expansion. For every 10-degree Celsius increase, the metal structure expands by about 2 centimeters, meaning the tower can grow roughly 10 centimeters during the hot French summer. Additionally, because the sun heats only one side at a time, the tower slightly tilts away from the sun, causing its tip to move in a circular path up to 15 centimeters in diameter throughout the day.

When temperatures drop after storms or in winter, the tower contracts back to its original size. The engineers who designed the tower accounted for these natural fluctuations, ensuring the structure’s stability despite these changes. While the height variations are significant on paper, they are imperceptible to the naked eye and do not affect the tower’s integrity.

Thus, the Eiffel Tower continues to "breathe" with the weather, demonstrating the effects of physics and the impact of intensifying climate conditions on even the most famous landmarks.