Germany Heatwave 2025: What Expats Need to Know to Stay Safe

Introduction

Germany is in the grip of a punishing summer. Night-time temperatures only fell below 20°C on Thursday for the first time in days — and forecasters warn another heatwave is already on its way. For expats who moved here from warmer climates, Germany's approach to extreme heat can feel surprisingly unprepared: most flats and offices lack air conditioning, and the public health infrastructure around heat is less visible than in southern Europe. For those who came from colder countries, the intensity can be shocking. Either way, knowing your rights and the available resources can make a real difference to your health, your work life, and your wallet.

Why Germany Struggles With Heatwaves

Germany's housing stock was built for cold winters, not hot summers. Thick walls and double-glazed windows that keep warmth in during January trap heat mercilessly in July. Air conditioning units are still relatively rare in private homes and even many offices, partly due to energy costs and partly cultural habit. Older buildings in cities like Berlin, Hamburg, and Leipzig can become genuinely dangerous during prolonged hot spells, especially for elderly residents or those with respiratory conditions.

Urban heat islands — built-up city centres that absorb and retain heat — make temperatures several degrees higher than surrounding green areas. If you live in a city-centre flat, you may experience temperatures 3–5°C above what weather apps report for your city.

Practical Steps to Stay Safe

Health authorities recommend a consistent set of measures during heatwaves that are worth reviewing:

• Hydrate proactively. Drink water regularly even if you do not feel thirsty. Aim for at least 2–3 litres per day during extreme heat.
• Close windows and shutters during the day. Keep blinds or external shutters closed while the sun is high, and open windows at night when air finally cools.
• Avoid outdoor exertion between 11:00 and 17:00. This is when UV levels and air temperatures peak.
• Identify your nearest cooling space. Libraries, shopping centres, cinemas, and some churches are publicly accessible cool spaces. Several German cities operate official Kühle Orte (cool places) programmes — check your city's website or app.
• Check on neighbours. Germany has an ageing population; isolated elderly people are at the highest risk during heatwaves.

Your Rights at Work During a Heatwave

This is an area where many expats are caught off-guard. German law (Arbeitsstättenverordnung — Workplace Regulation) requires employers to maintain a healthy working environment, which includes managing temperature. The recommended maximum indoor working temperature is 26°C, with measures required above 30°C and work potentially suspended above 35°C in some cases.

In practice, your employer should provide:

• Fans or ventilation
• Access to cold drinking water at no cost
• Adjusted working hours (early start, earlier finish) where possible
• Protective equipment for outdoor workers (sunscreen, hats)

If your workplace is dangerously hot and your employer is not acting, you can contact your Betriebsrat (works council) if one exists, or reach out to the relevant trade union or the state occupational health authority (Gewerbeaufsichtsamt).

Water and Infrastructure Disruptions

Prolonged heat is also straining Germany's infrastructure. River water levels on the Rhine and Elbe drop significantly during dry summers, disrupting freight shipping and, in some regions, affecting drinking water supply. Some municipalities have already urged residents to reduce water consumption — avoid filling garden pools, watering lawns, or washing cars with tap water during restriction periods. Violations can carry fines in some districts.

Frequently Asked Questions

Can my employer make me work in extreme heat?

In Germany, employers have a legal duty of care. If indoor temperatures exceed 30°C, they must take action (ventilation, cool drinks, schedule changes). Above 35°C, many tasks cannot reasonably be required. If you feel unsafe, document the temperature, speak to your employer in writing, and contact your trade union for guidance. This applies to all workers regardless of residency status.

Are there official cooling centres I can visit?

Many German cities — including Berlin, Munich, Frankfurt, and Hamburg — run programmes listing publicly accessible cool spaces during heatwaves. Search for "[your city] Kühle Orte" or check your city's official website. These are usually free and open to everyone, including tourists and non-registered residents.

What should I do if I or someone nearby shows signs of heat stroke?

Heat stroke (Hitzschlag) is a medical emergency. Signs include confusion, hot dry skin, rapid pulse, and loss of consciousness. Call 112 (Germany's emergency number) immediately. While waiting, move the person to shade, cool them with wet cloths, and fan them. Do not give water to an unconscious person.

Conclusion and Next Steps

Germany's heatwaves are becoming longer and more intense each year — this is no longer an unusual summer anomaly. As an expat, it is worth preparing your home (blackout blinds make a significant difference), understanding your workplace rights, and knowing where to find cool public spaces. Keep an eye on official city communications, particularly if you live with children, elderly relatives, or people with chronic health conditions. The next heatwave is already forecast — use the current brief cool spell to prepare.

Source: The Local Germany