How Much Does Heat Cost the Czech Republic?
The Czech Republic fits into this wider European pattern. A rough estimate suggests that a 14-day heat wave could cost the Czech economy between €419m ($478m) and €620m ($707m). The median estimate is approximately €500m ($570m).
In a milder scenario, in which the heat is uncomfortable but does not paralyze operations and is not accompanied by severe drought, the cost could be around €290m ($331m). In a worst-case scenario, in which temperatures repeatedly hit 40C, illness rates rise, work is interrupted more frequently and agricultural damage occurs, the cost could reach €825m ($941m).
These are not exact statistics, but a qualified macroeconomic estimate. It is based on peer-reviewed international research, European and Central European models and Czech health studies.
The estimate confirms a fundamental mechanism: severe heat waves are not merely a health, climate or agricultural issue. They are also a labor productivity problem. In overheated buildings, manufacturing facilities, schools, warehouses and offices, people work more slowly, make more mistakes and are absent from work more often.
The Austrian Comparison
A relevant Central European analogy is provided by the study Economic Impact of Labor Productivity Losses Induced by Heat Stress in Austria, published in the journal Climatic Change. Austria is a Central European economy with strong manufacturing, services and links between sectors.
The study shows that heat stress spreads through the economy not only via individual workers, but also through supplier-customer links between sectors. In the model, the sectors most directly affected are those involving outdoor work, especially agriculture and construction, but the consequences are also transmitted further through the economy.
Under the worst-case scenario, the study estimates an average loss of real GDP of about 0.7% compared with the baseline scenario. Delays in construction, agriculture or logistics can subsequently spill over into manufacturing, trade and investment.
What the Research Reveals
International academic literature points in the same direction at a broader level. A Nature study, Global Non-Linear Effect of Temperature on Economic Production, found that economic output follows a curved relationship with temperature: it peaks at an annual average of around 13C and declines sharply above that level.
The study also found that this relationship extends beyond agriculture to industry and services. Heat, in other words, is not just a problem for farms and building sites. It is a problem for the entire economy.
Similarly, the study Temperature and the Allocation of Time, published in the Journal of Labor Economics, shows that high temperatures reduce labor supply, particularly in sectors directly exposed to the weather.
Put simply, when it is too hot, some work does not get done. People work shorter hours, work more slowly or shift their work to different times of day. This reflects the situation on construction sites, in agriculture, transport, warehouses and other operations where the entire working environment cannot simply be moved into an air-conditioned office.
Further direct evidence comes from the study The Impact of Temperature on Productivity and Labor Supply, published in the Journal of Political Economy, which focuses on manufacturing.
The analysis found that high temperatures reduce worker productivity in factories and increase absenteeism. According to the study, annual plant output in a national panel of factories declines by approximately 2% for every additional degree Celsius. Another important finding is that air conditioning and workplace temperature control significantly mitigate these losses.
Heat, in other words, is also a tax on unpreparedness. Those with air-conditioned facilities, shade, adjusted shifts and modern buildings pay less. Those without these protections pay more.
Two Percent of Annual Work Time
The International Labor Organization (ILO) states in its report Working on a Warmer Planet that by 2030, heat stress could cost the global economy more than 2% of total annual working time, either because it is too hot to work or because people have to work more slowly.
Specifically, this amounts to 2.2% of total working hours, equivalent to 80 million full-time jobs. The ILO identifies agriculture and construction as the sectors most at risk. These are also among the most vulnerable sectors in the Czech Republic during heat waves.
The health impact in the Czech Republic is documented in the study Temporal Changes in Years of Life Lost Associated with Heat Waves in the Czech Republic, published in the journal Science of the Total Environment. The study examined changes over time in the number of years of life lost in connection with heat waves in the Czech Republic between 1994 and 2017.
It concluded that the frequency and intensity of heat waves in the Czech Republic have increased and that the overall health burden associated with heat has risen. Economically, this means higher healthcare expenditure, more absenteeism, lost working hours and pressure on public budgets.
An earlier Czech study, Mortality and Displaced Mortality During Heat Waves in the Czech Republic, published in the International Journal of Biometeorology, analyzed mortality during 17 heat waves in the Czech Republic.
It found that overall mortality during these episodes increased by an average of 13%. In some early-summer episodes, the relative increase in both overall and cardiovascular mortality exceeded 20%. The figures support the argument that high temperatures cause not only discomfort, but real social and economic costs, placing a burden on the healthcare system, families, employers and public finances.
Construction and Agriculture Bear the Brunt
The hidden cost of heat waves is most evident on construction sites. Working on scorching scaffolding, roads or rooftops is not only unpleasant, but often dangerous. Companies must introduce more frequent breaks, move work to the early morning, ensure adequate hydration and expect a slower pace of work.
If a construction company loses a tenth of its productivity on hot days, this is not an abstract loss. It means project delays, higher labor costs and sometimes even contractual penalties.
Agriculture is similarly affected. There, intense heat affects not only people’s work performance, but also the soil, water, plants and animals. When high temperatures are combined with drought, there is a risk of lower yields of grain, vegetables, fruit and forage crops.
This may not be immediately apparent, but it eventually shows up in food prices or farmers’ costs. What is particularly treacherous is that the damage can accumulate. A single hot day will not destroy a field, but a series of hot days without rain can fundamentally change the outcome of the season.
Cooling Is a Necessity, Not a Luxury
Another factor is energy consumption. Both households and businesses need more cooling. Air conditioners, fans, refrigerators, freezers and cooling systems are running in stores, warehouses, restaurants and hotels. For part of the economy, cooling is a necessity, not a luxury. The result is higher electricity bills and higher operating costs.
While sellers of air conditioners, fans, bottled water, ice cream and beverages profit in the short term, from the perspective of the economy as a whole, this is largely just a shift in consumption. Money that a household spends on cooling or beverages is often not spent elsewhere.
Poorer Households Are Worse Off
Extreme heat waves are also a regressive tax. They hit hardest those who are least able to protect themselves. Wealthier households have air conditioning, better-insulated apartments, outdoor shade or the option of leaving the city. Poorer households often live in overheated apartments and have to scrimp on electricity as well.
The situation is similar for workers. A manager in an air-conditioned office is less affected than a construction worker, courier, driver, warehouse worker or cook in an overheated workplace.
The economic lesson is simple. Heat waves do not just cause discomfort. They also lead to higher bills, lower productivity, greater health burdens and pressure on both public and corporate budgets.
Society, businesses and individuals will have to invest more in shade, urban greenery, water retention, better-insulated buildings, adjusted working hours and modern cooling systems. Otherwise, they may find themselves paying the hidden tax of extreme heat more and more often.
Originally published on the author's personal website lukaskovanda.cz.
