Q&A on the heatwave Should I skip exercise at lunchtime in this heat?

Heatwaves have become increasingly frequent and intense, prompting concerns over their impact on public health and safety. A recent alert has highlighted five professions that face the highest risk during extreme heat conditions. These include outdoor workers such as construction laborers, agricultural workers, and road maintenance personnel, as well as those working in industrial settings with limited access to cooling systems. The warning comes amid rising temperatures, with some regions recording daily highs exceeding 35°C. The current heatwave has led to increased discussions about how individuals can safely manage physical activity during periods of extreme weather. Experts suggest shifting exercise routines to cooler parts of the day, early mornings or evenings, to avoid peak heat hours. This advice was echoed by Samuel Lüthi, who emphasized the importance of adjusting daily schedules to accommodate the body’s limits. He noted that even brief breaks can help prevent overexertion and reduce the risk of heat-related illnesses. Research indicates that high ambient temperatures can negatively affect mental health, potentially contributing to depression, anxiety, and aggressive behavior. Studies show that prolonged exposure to heat can impair cognitive function, particularly when combined with physical exertion or sleep disturbances. Christine Blume explained that elevated temperatures may disrupt sleep patterns, which in turn affects concentration and decision-making abilities. She recommended avoiding caffeine intake close to bedtime to ensure better rest, especially during hot weather. Long-term exposure to heat stress has been linked to chronic health issues, including kidney problems. Samuel Lüthi pointed out that workers in high-risk jobs, such as those in construction or agriculture, are more likely to experience these complications. While alcohol consumption is clearly associated with dehydration, the role of caffeine in exacerbating heat effects remains less clear. Nevertheless, experts advise caution, as both substances can contribute to fluid loss and worsen symptoms during heatwaves. Public awareness of the dangers posed by heat continues to grow, yet many remain underprepared. According to Lüthi, while efforts have been made to educate the population, there is still a gap in understanding how to effectively respond to extreme heat. In particular, older adults often isolate themselves during heatwaves due to a lack of knowledge about safe alternatives. This trend has been observed internationally, with reports indicating an increase in domestic violence and petty crime during periods of sustained high temperatures. Experts warn that Switzerland, despite its efforts, is not fully equipped to handle the growing threat of heatwaves. The country's infrastructure, including homes, hospitals, and schools, tends to overheat quickly, making it difficult to maintain comfortable indoor environments. Lüthi noted that while cold winters are managed relatively well, the challenges posed by summer heat are underestimated. Climate data suggests that temperatures in Europe are rising faster than the global average, with Switzerland experiencing one of the sharpest increases. This rapid warming underscores the urgency of implementing adaptive strategies to protect vulnerable populations.