Summary of Key Points
The extreme heatwave at the end of June in France resulted in the death of 2.5 to 3 million poultry birds (mostly chickens), highlighting the vulnerability of modern poultry farming systems to climate change. Chickens lack sweat glands and rely on breathing to cool down, and modern fast-growing meat chickens, with their rapid metabolism, are particularly susceptible to heat. Similar mass deaths of poultry have occurred in many parts of the world due to high temperatures. Farmers have tried various measures such as using cooling equipment and heat-resistant breeds, but these approaches come with trade-offs regarding cost and effectiveness. This incident highlights a fundamental issue: the food supply system, which once focused on extreme efficiency and low costs, is becoming increasingly vulnerable to frequent extreme weather events.
Detailed Analysis
1. Why do chickens die so quickly in high temperatures?
Chickens, unlike humans, do not have sweat glands and cannot cool down by sweating. They can only breathe heavily, which leads to dehydration and exhaustion, making them prone to heatstroke and death. Modern fast-growing meat chickens, bred for rapid weight gain (in as little as 5 weeks), have an even higher metabolic rate and generate more heat, making them even more vulnerable. The optimal temperature for chickens is between 18-21°C, but during the heatwave, temperatures reached 40°C, which was simply unbearable for them. Even slower-growing chickens in open environments could not survive.
2. How severe was the disaster?
2.5 million chickens died, causing significant losses for farmers. In western France, temperatures exceeded 40.6°C, leading to a tenfold increase in the number of dead poultry. Companies responsible for handling the carcasses were overwhelmed, and the dead birds piled up and rotted. Some particularly heartbreaking cases include:
- At the Renaudier farm, one-third of 1,500 chickens died overnight; these chickens were supposed to be sold to supermarkets and restaurants in 19 days.
- At the Delavau farm, the temperature in the turkey sheds reached 41.7°C. The cooling spray failed due to insufficient water pressure, and the large number of dead birds damaged the cold storage facilities. The entire family had to dig pits to bury them, working in the sweltering heat.
Although this number is lower than the 4-5 million deaths in 2003, it is still considered a “historic” event.
3. It’s not just France! The global poultry industry is facing challenges from high temperatures
This is not a French phenomenon alone. In 2015, 17 million chickens died in India due to extreme heat, leading to price increases for chicken meat. In 2021, 400,000 chickens and 60,000 turkeys died in the US northwest. Researchers have identified this as a widespread issue within the poultry industry. The seemingly constant supply of chicken meat in supermarkets is actually very fragile to extreme weather, which can easily disrupt production.
4. What can farmers do?
Farmers have tried various methods such as using cooling systems and heat-resistant breeds, but there are no perfect solutions:
- Physical cooling: Installing powerful fans and spray systems, covering the roof of sheds with reflective materials to reduce heat absorption, and providing vitamins to boost resistance. However, these measures are costly and require electricity.
- Using heat-resistant breeds: For example, “naked-neck” chickens have less feathers on their necks and bodies, allowing for faster heat dissipation. Israel’s “hairless chickens” can still grow and lay eggs at 31°C, while regular chickens lose their appetite at such temperatures. However, the quality and nutrition of these eggs may differ from those of regular chickens, and these breeds are not yet widely used in modern farming.
- Increasing ventilation: Better ventilation improves conditions but reduces chicken numbers and thus profits.
- Installing air conditioning: This is too expensive for most farms to afford.
Some farmers have adjusted their breeding cycles to avoid the summer heat, but this is only a temporary solution.
5. The hidden cost of cheap chicken meat: vulnerable supply chains due to climate change
The low cost of chicken meat is achieved through extreme efficiency—fast growth and high-density farming. However, this approach makes the system vulnerable to climate-related challenges. The French heatwave serves as a warning: we have focused on producing cheap food at all costs, without considering the resilience of our supply chains to extreme weather. The fate of these chickens should not be determined by a single event; we need to reconsider whether the pursuit of low prices comes at the expense of environmental sustainability.
This incident is not just a tragedy for poultry but also a reminder that we must balance efficiency with resilience in our global food systems. Otherwise, the next time, it could be our own diets that are affected.