Swiss cities suffer sharp productivity decline amid 2026 heatwave

The Union des villes suisses calculated the economic impact of the 2026 summer heatwave using an EPFZ-developed model that assessed June to August performance. Nationwide, work productivity fell sharply, but cities felt the greatest strain because of intense heat exposure and their larger share of economic activity. The assessment, based on temperature data from MétéoSuisse, showed that the recent heatwave’s effect was more than three times the loss recorded for an average summer.

Among the 172 statistically defined towns, the total productivity loss was substantial, and the smallest municipalities within larger urban regions suffered the highest percentage declines. Cantons such as Basel-Landschaft, Solothurn and Aargau were singled out as particularly affected. The Union des villes suisses warned that systematic studies of climate-related economic consequences remain scarce in Switzerland, and future risk analyses project even larger losses by the 2030-2035 period if adaptation measures are insufficient.