On Wednesday, Allianz Trade published a report on heat and the German economy. The numbers are presented with appropriate confidence. Economic losses of €112.5 billion by 2030. A productivity decline of three percent per degree above thirty degrees Celsius. GDP losses of up to three percent over four years.
The report identifies thirty degrees as a threshold at which economic effects tip negative. Milo Bogaerts, Chief Executive of Allianz Trade in Germany, Austria and Switzerland, described extreme heat as "a structural economic shock." The word structural is doing significant work.
What Thirty Degrees Looks Like Elsewhere
Guangzhou sits at the centre of Guangdong province, China's largest economy by GDP. In July, the average temperature is 28 to 29 degrees Celsius. Peaks above 35 degrees are routine.
Guangdong's GDP reached CN¥14.16 trillion --- approximately $2 trillion --- in 2024. The province has been China's largest by output since 1989. It produces 70 percent of the world's consumer drones, 40 percent of global smartphones, and one-third of China's industrial robots. It has been doing this for decades above the Allianz threshold.
Singapore's GDP per capita in 2026 is $107,758. That figure represents 536 percent of the world average. Singapore's average daily temperature ranges from 27 to 31 degrees Celsius, year-round, without seasonal variation. If the Allianz model applied universally, Singapore's economy would have noticed.
Lee Kuan Yew credited air conditioning as a decisive factor in Singapore's development. The infrastructure was not incidental. It was built as a matter of state policy, deliberately and at scale.
Madrid recorded an average July temperature of 26 degrees Celsius, with regular peaks above 36. The Madrid region's GDP per capita stands 70 percent above the EU average. Spain's economy is outperforming the euro area in job creation and growth in 2026.
The Buildings
The Passivhaus standard is the preferred building method of German green energy policy. It is designed to minimise energy loss through high insulation and airtight construction. These properties are effective at retaining heat in winter.
In summer, they retain heat with similar efficiency.
The standard includes a summer comfort criterion. Internal temperatures must not exceed 25 degrees Celsius for more than 10 percent of the year. Ten percent of 8,760 annual hours is 876 hours --- approximately 36 days.
Germany currently averages around ten hot days per year, defined as days reaching at least 30 degrees Celsius externally. In 2023, the hottest year on record, the figure was 11.5 days. The worst recent years --- 2003, 2018, 2019, 2022 --- produced roughly 20 to 30 hot days each.
The buildings are within tolerance. They are performing as certified. The Passivhaus standard was designed knowing Germany would have hot days. The tolerance was calculated accordingly.
Allianz Trade describes the heat as a structural economic shock. The building standard covering millions of German homes anticipated these conditions and rated them acceptable. The question of why this constitutes a surprise is not addressed in the report.
The Electricity
The correction to heat-retaining buildings is mechanical cooling. German household electricity in 2026 averages 35 to 38 cents per kilowatt-hour, among the highest in Europe. It peaked at 47 cents in 2023.
In the United States, where 90 percent of households have air conditioning, electricity costs a fraction of this. Across Europe, the figure is 19 percent.
The Allianz report recommends accelerating the green transformation as a response to heat-related economic losses. The report does not examine the relationship between the green transformation and building insulation standards, or between the green transformation and electricity costs.
The Structural Problem
Allianz Trade's senior climate economist described Europe as "historically designed for cold." This is accurate. It applies with particular force to the building regulations of the last two decades.
The report is correct that heat costs money in Germany. It is correct that European infrastructure was not built for warmth. It identifies a structural problem. The structural problem has a history. That history is not examined.
The specialists have delivered their analysis. The analysis does not include the specialists.