Epidemiological studies of heat-related mortality show a larger effect in the elderly, with the risk increasing with increasing age above approximately 50 years old. However, children and babies also have limited ability to thermoregulate and are potentially at risk of dehydration and heat stroke. Three deaths in children from heat stroke occurred in France during the heat- wave in 2003 (Pascal et al., 2005) and one death was reported in the 2006 heat-wave (Empereur-Bissonnet et al., 2006).