An extreme heatwave is sweeping Germany and much of Western Europe, with temperatures forecast to exceed 30°C nationwide and reach as high as 41°C in the west and southwest, with no immediate relief in sight. The warning from health authorities is clear: this is not ordinary summer heat. In 2003, a comparable European heatwave killed 70,000 people in just three months, a figure the WHO continues to reference as a measure of what sustained extreme heat can do.
The German Medical Association and the German Alliance on Climate Change and Health have identified the most vulnerable groups as older adults, chronically ill individuals, pregnant women, young children, outdoor workers, and those living alone. Reduced circulation, certain medications, and an impaired sense of thirst make elderly people particularly susceptible, while babies and toddlers struggle to regulate body temperature effectively.
Health organisations are urging everyone to actively check on isolated neighbours and family members, warning signs can go unnoticed until a situation becomes critical.
The WHO draws a crucial distinction between the two. Heat exhaustion, marked by headaches, dizziness, nausea, and cramps, is serious but manageable with prompt cooling and hydration. Heatstroke is a medical emergency, identifiable by confusion, seizures, and collapse, and requires immediate professional intervention. Early dehydration signals such as sudden dizziness, weakness, and confusion should never be ignored.
Hydration is the first line of defence. The WHO recommends drinking two to three litres of fluid daily, water and herbal teas are best, while alcohol, caffeine, and sugary drinks should be avoided. Eating light, water-rich foods such as cucumbers, watermelon, and leafy greens can also help the body cope with the heat.
For the home, blocking sunlight with external blinds or shutters is the most effective method. Ventilate in the early morning, then close windows to trap cooler air inside. Unplug electronics when not in use, they generate more heat than most people realise. Electric fans are useful below 40°C, but above that threshold they push hot air onto the skin and worsen the situation. Pairing air conditioning set at 27°C with a fan can make a room feel up to 4°C cooler than it actually is.
Animals are just as vulnerable. The German Pet Industry Association warns that pets can only regulate body temperature within narrow limits, and when those limits are exceeded, the results can be fatal. Dog walks should be moved to the cooler morning and evening hours, so that they sweat less. Hot pavements can burn paws within seconds of contact. Guinea pigs and rabbits begin to suffer above 25°C and need constant shade and fresh water.
Caged birds should be kept away from direct sunlight and windows, with fans never pointed directly at them. If a pet shows signs of apathy, excessive panting, staggering, seizures, or breathing difficulty, move it immediately to a cool, dark space and contact a vet without delay.
German health associations have called on policymakers to commit to sustained funding for heat protection infrastructure, arguing that prevention costs far less than treatment. With climate change making heatwaves increasingly frequent and severe, preparation can no longer be reactive. Checking on a neighbour, keeping a pet in the shade, and recognising when dizziness signals something serious, small actions that, taken together, save lives.
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