England has entered its fourth heatwave of 2025. Historical comparisons for our current weather situation have seemed to beach at 1976.

Seared into the memory of many Britons over 55, that was the year when temperatures stuck at 30 degrees and there was no rain for nearly 50 days in a row. As a result, the UK government was forced to ration water. But Britain’s longest dry spell of the 20th century was not the worst for the wider continent.

For heat intensity and human cost across Europe we need to return to 2003. Back further, the heat and drought of 1911 easily eclipsed 1976 for European impact and before that 1757. And, above all, 1540, when there was no rainfall for almost the entire year. German chroniclers recorded that it was possible to walk across the Rhine.

Reaching further into the medieval past, the North Atlantic region passed through a climate anomaly between the 10th and 13th centuries. Research temperatures rose to around one degree celsius above the level that was typical at the turn of the 21st century.

Medieval Europeans became accustomed to hot, dry seasons – and they knew how to endure them.

Sadly, their experience cannot set us on a different course but it may have........

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