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Swiss Academy of Engineering Sciences SATW
A hot summer and Switzerland’s energy supply
According to MeteoSwiss, the summer of 2026 was the hottest since records began in 1864. At the same time, there had already been very little rainfall during the winter and spring, leading to extreme drought. The stable high-pressure weather also brought Switzerland a duration of sunshine well above the long-term average. These extreme weather events have far-reaching implications for society and the environment, and specifically for the energy supply. Christian Schaffner, Managing Director of the Energy Science Centre at ETH Zurich, provides an analysis for the SATW.



