London has been London since it was Londinium some 2,000 years ago. It was built on clay soil then, and still is today.
5 successive heatwaves later, and that clay drying out so fast, it's leaving cracks all over:
https://www.bloomberg.com/news/articles/2026-08-23/londoners-find-horrendous-cracks-in-homes-after-heat-waves @BloombergGreen
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