Background and objective: In France, during cold waves and episodes of snow and ice, health indicators of mortality and morbidity (IMM) are monitored as part of syndromic surveillance in order to inform the management of the French Institute for Public Health Surveillance (InVS) and, if necessary, the Directorate General for Health (DGS) of any potential impact. The number of indicators currently monitored (Table 1), derived from the literature or physicians’ experience, is significantly higher than for heat waves. Furthermore, these indicators have never shown a notable increase following a winter extreme weather event, with the exception of hypothermia, carbon monoxide poisoning, and trauma. The objective of this study is therefore to review the health indicators currently monitored for assessing the impacts of cold weather and snow-and-ice events in order to reduce their number and retain only those most relevant for routine monitoring and seasonal assessments.