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In the past few years, a poultry farm in Wuhan suddenly lost power, air-conditioning and exhaust systems were stopped for eight hours, and thousands of chickens died of heat. The coke field of the chicken farm said that the dead chicken was caused by a sudden power outage. According to him, on the morning of the previous day, the chicken farm suddenly lost power and stopped for 8 hours. “The temperature-controlled air-conditioning and exhaust system of each house in the chicken farm was stopped. The temperature inside the house rose from a constant temperature of 21°C to more than 30°C.†Because the chicken farm was closed, all the chickens were restricted in the cage . A sudden increase in temperature caused a large group of chickens to die of heat. Chicken farms generally have to have generators to avoid the tragedy caused by blackouts.