40°C in Germany and 45°C to 50°C in India: Why Heat Does Not Feel the Same Everywhere
The last week of June 2026 became a painful reminder that Europe is no longer protected from extreme heat. What once felt like an occasional summer discomfort turned into a serious public concern across many parts of Europe. The heat affected daily life, public health, transport, workplaces, schools, hospitals, agriculture, infrastructure, and even people’s sense of safety.
During this intense heatwave, several European countries faced record breaking temperatures and severe disruptions. Germany recorded temperatures above 40°C, with extreme heat warnings issued in many regions. In Berlin, people struggled under unusually high temperatures, and in some public places, water was sprayed to help people cool down. In other parts of Europe, trains were delayed, railway systems came under pressure, roads softened or buckled, outdoor events were cancelled, and hospitals reported more cases of dehydration, heatstroke, exhaustion, and heat related stress.
France and Spain faced especially painful consequences, with reports of excess deaths linked to the extreme heat. Southern France also saw wildfires intensified by dry conditions and strong winds. In some areas, people rushed to buy fans and cooling units because many European homes are still not prepared for such intense summer heat. This was not just “hot weather.” It was a warning sign.
For many Indians living in Germany and Europe, this heatwave also raised an interesting question. People often say, “You are from India. You must be used to 45°C or 50°C. For you, 40°C in Germany should be nothing.”
At first, this sounds logical. India experiences some of the world’s most intense summer heat. In many parts of North India, Central India, Rajasthan, Delhi NCR, Punjab, Haryana, Uttar Pradesh, Madhya Pradesh, Gujarat, and parts of Maharashtra, temperatures can cross 45°C during peak summer. Some places even touch 48°C or 50°C during extreme heatwave periods.
But scientifically, this comparison is incomplete.
A person’s heat experience is not decided by temperature alone. A 40°C day in Germany can feel extremely harsh, suffocating, and even dangerous, especially when there is no wind, high humidity, strong sunlight, heated buildings, and no proper cooling inside homes. Similarly, 45°C in India is also dangerous, but people living there often adapt through lifestyle, clothing, food habits, building structure, cooling methods, daily routines, and social awareness.
So the real question is not simply: Which country is hotter?
The better question is: How does the human body experience heat in different climates?
Temperature Is Only One Part of the Story
Weather reports usually show air temperature, but the human body feels something more complex. The body responds to what scientists call thermal stress or perceived temperature. This includes air temperature, humidity, wind speed, solar radiation, clothing, physical activity, and the body’s own ability to cool down.
For example, 40°C in dry air with moving wind may feel different from 40°C in humid, stagnant air. A person standing under direct sun on a concrete street will feel much hotter than someone sitting under a tree. A person inside a top floor apartment without air conditioning may suffer more than someone sitting in a shaded courtyard with a fan or cooler.
This is why the German Weather Service does not look only at temperature. It uses perceived temperature to assess heat stress. This model considers humidity, wind, radiation, clothing, physical activity, and human body heat balance.
In simple words, 40°C is not always just 40°C.
Why 40°C in Germany Can Feel So Intolerable
Germany was historically a temperate country. For most of the year, people deal more with cold, rain, cloudy skies, and moderate summers than with long periods of extreme heat. Many homes, schools, offices, trains, and public buildings were designed to preserve warmth, not to release heat quickly.
This becomes a serious problem during a heatwave.
Many German apartments have large glass windows, heavy insulation, closed building structures, and limited ceiling fans or air conditioning. During a heatwave, walls, roofs, and windows absorb heat during the day. At night, if the outdoor temperature does not fall enough, the building cannot cool down properly. The next day begins with already heated indoor air.
This is especially difficult in top floor apartments, old buildings, attic rooms, and densely built urban areas. Even if the outside temperature is 38°C or 40°C, the indoor temperature may remain uncomfortable late into the night. The body then does not get enough time to recover.
Night recovery is extremely important. During sleep, the body needs cooler conditions to reduce internal stress. When nights remain warm, heart rate, sweating, dehydration, headache, fatigue, and poor sleep can increase. After two or three hot nights, even a healthy person can feel exhausted.
The Role of No Wind: When the Air Feels Stuck
The experience of “no air outside” is very important. When there is no wind, the heat feels heavier.
The human body cools itself mainly through sweating. But sweat cools the body only when it evaporates. Moving air helps evaporation. A breeze can remove the warm, moist layer of air around the skin and allow fresh air to pass over the body. This gives some cooling effect.
When there is no wind, this process slows down. The warm air around the body remains trapped. Sweat stays on the skin. The body feels sticky, tired, and overheated. In cities, this stagnant air can feel even worse because concrete, roads, cars, buildings, and public transport systems release stored heat.
This is why a 40°C day without wind can feel suffocating. It is not only heat. It is heat plus still air plus trapped radiation plus poor ventilation.
However, there is one more scientific detail. Wind is helpful only when it supports cooling. In very hot and dry conditions, such as India’s loo winds, wind itself can feel like a blast of hot air. If the wind is hotter than the skin and carries dust and dryness, it can increase dehydration and heat stress. So wind can cool or worsen heat depending on temperature, humidity, and surrounding surface heat.
Why India Tolerates 45°C and Above, But Not Easily
It is important not to romanticise Indian heat tolerance. Indians do not “easily” tolerate 45°C or 50°C. Extreme heat in India is also dangerous, sometimes deadly. Heatwaves affect outdoor workers, farmers, street vendors, construction workers, traffic police, school children, elderly people, pregnant women, and people with chronic illnesses.
But India has lived with intense summers for generations. Over time, people have developed many adaptation habits.
Daily life often changes during summer. People avoid going out in the afternoon. Markets may be active early morning or late evening. Many people use cotton clothes, dupattas, caps, umbrellas, water bottles, lemon water, buttermilk, aam panna, coconut water, and ORS. Homes often have ceiling fans, desert coolers, cross ventilation, shaded balconies, curtains, water sprinkling, and roof cooling practices. In many regions, people know which foods feel lighter during summer and which routines help the body cope.
Public awareness is also different. In very hot Indian regions, people expect summer to be dangerous. Schools may change timings. Government advisories warn people against afternoon exposure. Families remind children and elderly people to drink water and stay indoors.
These habits do not remove the danger of extreme heat, but they create a culture of heat preparedness.
Why Indians in Germany May Not Tolerate 40°C
An Indian person living in Germany may have grown up with 45°C summers, but that does not mean their body remains permanently adapted to extreme heat.
Heat acclimatisation is not a permanent certificate. The body adapts to recent weather conditions. If someone has lived in Germany for years, their body may become used to cooler summers, colder winters, indoor heating, different food habits, different daily schedules, and less exposure to extreme outdoor heat.
When a sudden 40°C heatwave arrives, the body may not be ready.
Also, lifestyle in Germany is different. People may need to walk more, use public transport, cycle, carry groceries, commute without air conditioned trains, or sit in offices and apartments without cooling. In India, many people structure their day around heat. In Germany, work timings, school schedules, transport systems, and appointments often continue in the same pattern, even during high heat.
A person from India may therefore suffer in Germany not because they are weak, but because the environment, infrastructure, and daily rhythm are different.
Humidity: The Hidden Heat Multiplier
Humidity plays a major role in heat tolerance. When humidity is high, sweat evaporates slowly. The body continues to sweat but does not cool efficiently. This creates a dangerous situation: the person loses water and salts but does not receive enough cooling benefit.
In Germany and Europe, heatwaves may sometimes come with humidity, especially before thunderstorms or in dense cities with limited air movement. At 40°C with moderate to high humidity, the perceived temperature can feel far above 40°C. The body feels heavy, breathing may feel uncomfortable, and even simple activities like cooking, cleaning, walking, or sleeping become difficult.
In India, the heat experience differs by region. Rajasthan and parts of North India may experience dry heat, while coastal India, eastern India, and monsoon influenced regions may experience humid heat. Dry heat can cause rapid dehydration. Humid heat can reduce sweat evaporation. Both are dangerous, but they affect the body differently.
This is why comparing India and Germany only by maximum temperature is scientifically wrong.
Buildings Matter: Germany Was Built for Winter
One of the biggest differences between India and Germany is the built environment.
Many Indian homes, especially older homes, were designed with heat in mind. Courtyards, shaded verandas, high ceilings, thick walls, open windows, terraces, ceiling fans, and cross ventilation were traditional cooling tools. Even though modern Indian cities are now facing serious heat problems due to concrete buildings and glass structures, the cultural memory of heat adaptation is still strong.
Germany’s housing design is different. It has traditionally focused on insulation against cold. This is useful in winter, but during heatwaves it can trap heat inside. Many homes do not have ceiling fans. Air conditioning is still not common in many households. Windows may be opened only during cooler hours, but if the night remains warm or there is no breeze, indoor cooling becomes difficult.
As a result, people may feel trapped inside hot apartments. Outdoor areas may be too hot, and indoor areas may not provide relief. This makes 40°C in Germany physically and mentally exhausting.
The Psychological Side of Heat
Heat tolerance is also psychological. In India, people expect summer to be harsh. They prepare mentally and practically. In Germany, many people wait for summer as a pleasant season after long winters. A sudden extreme heatwave feels like a shock to the system.
For immigrants, this can be even more complicated. An Indian living in Germany may feel confused: “I survived Indian summer. Why am I feeling so uncomfortable here?” The answer lies in climate adaptation. The body, home, clothing, routine, food, transport, and social behaviour have all changed.
Heat is not only outside the body. It enters daily life.
It affects sleep, concentration, mood, appetite, productivity, parenting, elder care, pregnancy, commuting, and work performance. People may feel irritated, tired, dizzy, or emotionally drained. These reactions are not imagination. They are part of heat stress.
India’s 45°C and Germany’s 40°C: Both Are Serious
The correct conclusion is not that India’s heat is easier or Germany’s heat is worse. The scientific conclusion is that heat must be understood in context.
45°C in India is a severe heat condition. It can be life threatening, especially for people exposed outdoors or without cooling access.
40°C in Germany can also be severe because the country is less adapted to such temperatures. Buildings may overheat, nights may remain warm, wind may be absent, humidity may increase discomfort, and air conditioning may not be available.
For Indian migrants, the body may no longer be acclimatised to Indian style heat. Their German lifestyle may expose them to a different kind of heat stress. Therefore, it is unfair to say: “You are Indian, so you should tolerate this.”
Heat tolerance is not nationality. Heat tolerance is biology plus environment plus adaptation.
What People Should Do During Heatwaves
During extreme heat in Germany, people from all backgrounds should take precautions. Keep windows closed during peak heat and open them early morning or late night if the outside air is cooler. Use curtains, blinds, wet towels, fans, cool showers, and light cotton clothing. Drink water regularly, even before feeling thirsty. Avoid heavy meals, alcohol, and intense physical activity during peak afternoon hours. Check on elderly neighbours, children, pregnant women, and people living alone.
For Indian families in Germany, it may help to revive some familiar summer habits: lemon water, chaas, light food, cotton clothes, shaded walking, early cooking, and avoiding unnecessary outdoor work during peak heat.
At the same time, Germany and Europe need long term adaptation. Homes, schools, offices, hospitals, public transport, and cities must be redesigned for hotter summers. More trees, shaded streets, cooling centres, climate friendly building renovation, better ventilation, and public awareness are no longer optional. They are becoming necessary.
The real lesson
A person’s ability to tolerate heat cannot be judged by passport, birthplace, or childhood experience. A 40°C heatwave in Germany can be extremely harsh for Indians, Germans, and everyone else because the body responds to the total heat environment, not to a number on a thermometer.
India’s 45°C to 50°C heat and Germany’s 40°C heat are different climatic experiences. Both can be dangerous. Both deserve respect. And both remind us that climate change is not a distant topic anymore. It is entering our homes, our sleep, our health, and our daily routines.
The real lesson is simple: do not compare suffering by temperature alone. Understand heat scientifically, prepare wisely, and protect human health with compassion.
Published by Indo German Spectrum
www.indo-germanspectrum.com
