Statistical Model Attributes 20,390 Excess Deaths to June European Heatwave

The estimate relies on historical correlations between daily temperatures and all-cause mortality applied to observed heatwave temperatures rather than waiting for complete death registries. Because only 25-80 percent of deaths are captured in initial French reporting systems, modeled figures consistently exceed official counts that rarely list heat as a contributing cause on certificates. The approach captures immediate mortality but omits documented longer-term effects including elevated kidney failure and cardiovascular events months afterward. Adaptation such as wider air-conditioning access may have reduced vulnerability since the training period, suggesting the true toll lies between 15,000 and 20,000.