European homes failing in extreme heat — France's dangerous "RGA" effect explained
France experienced temperatures above 43°C last summer, and single-family homes across the country are increasingly struggling to cope with extreme heat. The article describes the dangerous "RGA effect" — retrait-gonflement des argiles — a phenomenon where clay soil shrinks during droughts and swells when wet again, causing structural damage to building foundations. The problem is becoming more widespread across Europe as heatwaves intensify.
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