Soaring temperatures surpass previous highs, leading the question: What's thebreaking point?
In the sweltering clima of summer, it's crucial to take precautions to protect ourselves from the harmful effects of excessive heat. According to Dr. Daniel Atkinson, GP Clinical Lead at Treated, increased temperatures lead to an increase in metabolic rate, making our bodies work harder to maintain regular functions. A recent study by researchers at the University of Roehampton in London suggests that the upper critical temperature (UCT) for humans is likely between 40°C and 50°C (104°F and 122°F). On July 4, the world witnessed a record-breaking heatwave, with temperatures soaring above the UCT. Parts of the United States, such as Death Valley, CA, and several cities in Texas, had temperatures above 104 degrees Fahrenheit in recent weeks. Exposure to extreme heat can cause a range of illnesses, from heat cramps and exhaustion to the most severe form of heat-related illness – heat stroke, which can potentially cause death. Symptoms of extreme heat may include profuse sweating, dehydration, dizziness, nausea, headache, fatigue, muscle cramps, rapid heartbeat, confusion, and high body temperature. Vulnerable populations, such as the elderly, children, pregnant women, individuals with chronic illnesses, and those with limited access to cooling resources, are often more susceptible to the negative impacts of high temperatures. Dr. Naheed Ali, a physician-writer, emphasises the importance of seeking medical attention for severe symptoms or seeking shelter in designated cooling centers during heatwaves. Researchers at the US National Institutes of Health have also studied the threshold temperature at which human metabolism begins to significantly increase. They found that even mildly cool rooms (around 19 °C) cause a 13% increase in calorie intake without an immediate rise in energy expenditure, suggesting an evolved survival reflex. This finding is relevant for workers, athletes, travelers, and medical professionals by highlighting how ambient temperature affects metabolism, hunger, and energy balance. Prof. Lewis Halsey and his research team presented their findings at the SEB Centenary Conference in Edinburgh, Scotland, in early July. Halsey's presentation will delve into what has been learned since the 2021 study, shedding light on the intricate relationship between temperature and human health. To protect oneself from extreme heat, it's essential to stay hydrated by drinking plenty of water, wear lighter-colored, loose-fitting, lightweight clothes, stay indoors when it's hot, keep your home or workplace well-ventilated, close curtains to block out sunlight, avoid intense exercise on hotter days, be aware of local weather forecasts and heat advisories, and keep an eye on those who are particularly vulnerable. By following these guidelines and staying informed about the risks associated with extreme heat, we can ensure a safer and healthier summer for all.
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