The exceptional heatwave that struck much of France at the end of May had direct consequences for the healthcare system. According to data published jointly by the Ministry of Health and Public Health France, the early heatwave led to a marked increase in emergency room visits, confirming the health impact of this weather event, which was described as historic for this time of year.
From May 22nd onwards, health authorities observed a steady increase in emergency room visits, hospitalizations, and SOS Médecins (a French medical service providing home visits) interventions related to the heatwave. The peak was reached on May 26th with 411 emergency room visits and 253 consultations provided by SOS Médecins. Hospitalizations following emergency room visits also increased, reaching a high of 230 admissions on May 29th.
The effects were particularly pronounced in the departments under orange alert.
Data shows that departments placed under orange heatwave alert recorded twice as many medical consultations as areas not affected. The main illnesses observed were hyperthermia, dehydration, hyponatremia – an abnormally low level of sodium in the blood – as well as various other health problems caused by high temperatures.
Health authorities also noted unusual patient profiles for this type of event. Hyperthermia and heatstroke primarily affected children under 15 and adults aged 15 to 44. Conversely, dehydration and fluid imbalances were more prevalent among people over 75, traditionally the most vulnerable during periods of extreme heat.
A record-breaking heatwave for the month of May
According to Météo-France, this heatwave is one of the earliest ever recorded in mainland France. Authorities emphasize that the health impacts observed among children, adolescents, and young adults were more significant than during typical summer heatwaves.
This situation highlights the need to further adapt the spaces frequented by these populations. Schools, sports facilities, leisure centers, and public spaces will likely need to strengthen their prevention measures in the face of heat waves that could become more frequent in the coming years due to climate change.
A controversy surrounding government prevention
In response to criticism that has emerged in recent weeks, the Ministry of Health maintains that it anticipated the necessary preventative measures. Regional health agencies, prefectures, and local authorities have been mobilized to disseminate warnings and support those most vulnerable to the risks associated with extreme heat.
However, several unions within Public Health France, as well as the "Public Health in Danger" collective, have denounced the lack of dissemination of a national prevention campaign that was ready to be launched before the heatwave arrived. This controversy arises in the context of a reorganization of Public Health France's missions. Concerns focus in particular on a possible reduction of the agency's scientific autonomy, while experts agree that episodes of extreme heat are likely to become more frequent and intense in the coming years.
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