Video – Leman Measured at 23.6 °C in May, Why Is It Alarming

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In Switzerland, lakes and rivers already record full summer temperatures. Under the combined effect of an early heat dome and a winter snow deficit of 25%, rivers overheat and glaciers are unprotected. We explain in video why this is bad newsAt the end of May, 26 of the 32 largest lakes in Switzerland reached surface temperatures never recorded at this time of year. And in Bern, the river Aar crossed the 20-degree bar. This is the first time tha…