A majority of people in France suffered sleep disorders following five consecutive summer heatwaves, according to an Ipsos BVA-CESI survey released on Monday, August 24.
The study, published jointly by market research group Ipsos BVA and the CESI engineering school, tracked public health across the nation between late May and August. During those months, five successive heatwaves pushed temperatures over 40 degrees Celsius across France. In addition to the 56 percent of participants who suffered from sleep disturbances, 32 percent of respondents reported stopping sports activities, while 29 percent experienced mild health problems such as headaches or drowsiness.
France, commonly referred to as l'Hexagone due to its six-sided geographical shape, has experienced rising summer temperatures that disrupt everyday routines. Prolonged high heat places intense physical stress on thermoregulation, forcing the human body to spend continuous energy attempting to cool itself down.
Post heatwave fatigue and medical warnings
Discussing the survey findings on the television show Bonjour La Matinale TF1, hosted by presenter Christophe Beaugrand, geriatrics professor Bertrand Fougère explained why so many people feel exhausted after extreme weather. TF1 is France's leading private television channel, and its morning broadcast frequently addresses public health topics. Fougère noted that feeling tired during and shortly after a heatwave is entirely normal because the body consumes substantial energy fighting heat while coping with poor sleep.
However, the medical specialist raised a key point of vigilance regarding long-lasting tiredness. Fougère warned that if exhaustion continues nearly 15 days after the final heatwave ends, it requires medical attention. He advised that anyone who has resumed a normal lifestyle and regular sleep schedule but remains fatigued should consult a doctor to ensure the tiredness is not caused by another underlying health issue.
Restoring fitness and sleep routines
To help recover physical condition and avoid sudden drops in energy, Fougère recommended engaging in regular physical activity. Comparing recovery from successive heatwaves to recovering from major physical exertion, he emphasized the need to rebuild muscle. Fougère pointed out that muscle mass drops quickly when physical activity stops, describing muscle loss as similar to snow melting in the sun, and reminded readers that regaining lost strength takes time.
In addition to returning to sports, Fougère urged people to monitor their sleep patterns closely. Because hot weather often leads people to fall asleep later in the evening, he stated that individuals must rebalance their daily schedules by adjusting both their bedtime and wake-up time. Fougère concluded that setting an earlier wake-up time naturally makes it easier to fall asleep earlier in the evening.
