The successive heat waves that have been battering Europe have ceased to be a mere summer anecdote and have become a major public health crisis. What we once saw as a few days of intense heat has now translated into staggering mortality figures, with thousands of additional deaths in countries like France and Spain. This situation has put not only emergency services to the test, but also urban planning, highlighting that our cities and homes are not always prepared to withstand sustained temperatures well above 40 degrees Celsius.
It's not just the feeling of being overwhelmed when you go outside, but how our bodies struggle to cope with a hostile environment. The scientific community warns that these episodes are becoming more frequent and intense due to climate change, forcing us to rethink prevention strategies. This is no small matter: prolonged exposure to these temperatures increases hospital admissions and exacerbates conditions that, under normal circumstances, would be under control, affecting diverse population groups from childhood to old age.
The invisible danger: the accumulated damage in the body
A very common mistake is thinking that the risk disappears as soon as the temperature drops. However, internal medicine experts point out that extreme heat acts like a marathon, depleting our reserves. The physiological damage accumulates day after day, and it's entirely possible for kidney failure or a stroke to appear weeks after the heat wave has officially passed. This heat-related aftereffect is especially dangerous because we tend to let our guard down precisely when our bodies are at their limit due to the effort of thermoregulating.
Furthermore, there's a factor that sometimes goes unnoticed: medication. Millions of people in Spain take drugs for high blood pressure, depression, or diabetes, which can cause problems in high temperatures. Some of these compounds directly interfere with the ability to sweat or increase fluid loss, accelerating dehydration without us even realizing it. Therefore, before the sun really gets intense, it's essential that those on chronic medications speak with their doctor to adjust their treatment plans if necessary.
The impact isn't limited to the physical, as mental health also suffers significantly. Recent studies link temperature spikes to an increase in anxiety and depression , as well as hindering restful sleep. When nights turn tropical and the mercury doesn't drop below 25 degrees Celsius (77 degrees Fahrenheit), blood pressure rises and the cardiovascular system doesn't get a break, creating an unpleasant cocktail for anyone, but potentially lethal for those with pre-existing heart conditions.
Social inequality also plays a role in this issue. Experiencing a heat wave in a poorly insulated attic in a low-income neighborhood is not the same as being in a home with good thermal efficiency and surrounding green spaces. It has been proven that mortality rates are higher in disadvantaged areas , where the lack of trees and poor-quality building materials turn houses into veritable ovens. This is where housing becomes the first line of defense against the extreme climate we are experiencing.
Vulnerable groups and effective prevention measures
Although the heat affects everyone, some groups need to be especially careful. Those over 65, particularly women, top the statistics for heat-related deaths. In children, the risk manifests differently, with a rise in pediatric emergency room visits due to fever and dehydration. Pregnant women should also not be forgotten, as extreme temperatures have been linked to a higher risk of premature births and other complications that require close monitoring during the summer months.
To help the population, many cities have begun setting up climate shelters. These are spaces like libraries, community centers, or shaded parks where people can go to cool off during peak hours. In places like Lleida and Valencia, these plans include increasing telecare calls to people who live alone to ensure they are drinking water and keeping their homes as cool as possible—a simple measure that saves countless lives every year.
Regarding the use of air conditioning, there is much debate, but health organizations are clear: when used properly, it is an indispensable ally. The key is not to turn your home into a refrigerator; maintaining a temperature between 22 and 24 degrees Celsius is usually sufficient to ensure comfort without causing throat or joint pain. If air conditioning is unavailable, finding ways to keep your home cool in summer or using air-conditioned public spaces for a couple of hours a day can make the difference between a scare and a peaceful afternoon.
Finally, common sense is your best travel companion. Avoiding exercise in extreme temperatures during the hottest hours of the day, seeking shade at all costs, and prioritizing a light diet based on fruits and vegetables are time-tested tips that still work. It's vital to drink water constantly, even if you don't feel thirsty, because by the time you feel thirsty, your body is already starting to show signs of dehydration. Keeping an eye on our elderly neighbors and never leaving anyone inside a parked car are basic rules that we should never forget.
Towards a new culture of thermal protection
The reality is that extreme heat is here to stay, forcing us to rethink how we experience summer. From adapting work schedules in sectors like hospitality to the energy-efficient renovation of buildings, every small adjustment counts in reducing the risk to public health. It's not just about enduring a few days of record temperatures, but about understanding that our bodies have biological limits that we must respect through constant prevention, medical monitoring of the most vulnerable, and urban planning that prioritizes shade and thermal comfort over the aesthetics of the streets. Ultimately, being well-informed and acting cautiously is what will allow us to enjoy the summer season while minimizing the dangers that the thermometer may pose.
