Heat waves must be considered as a threat to European populations living in climates that are currently temperate. While the elderly and people living alone are particularly vulnerable to heat waves, no segment of the population may be considered protected from the risks associated with heat waves.

This study evidenced the main features of LCH incidence in the overall population and was consistent with previous studies. The NRCH thus appears to be a very promising tool for further elucidation of LCH.