Europe's Second Heatwave of 2026 Poses Greater Mortality Risk Than the First

Europe's second major heatwave, beginning June 22, follows an earlier event that abated in recent weeks. Historical data from 2003 and 2022 show mortality spikes when populations and health systems already exhausted from preceding events face renewed heat stress. Physiological resilience declines; soil moisture deficits accumulated during the first episode amplify surface heating during the second. Grid operators across Spain, Italy, France, Germany, Ireland, and the UK face compounding pressure as institutions confront back-to-back crises.