Let me briefly explain what "light summer" is. "Slight summer heat" is one of the traditional solar terms in ancient China, the eleventh solar term among the fourteen solar terms and the fifth solar term in summer. The arrival of "Slight Summer" indicates the official start of the last month of summer. Generally speaking, when the sun reaches 105 on July 7 or 8 every year, it is regarded as a slight summer heat. )

Although light summer is not the hottest season in a year, it is followed by the hottest summer in a year. Just like the popular saying that "there is a slight heat on the top and steam on the bottom", after the slight heat, the weather will become more and more sultry and humid.

For friends in the south, after a mild summer, the weather is no different from midsummer. Among them, Guangdong, Guangxi and the Yangtze River basin have the most obvious sense of city. (The main reason is that the temperature has reached above 35 degrees at this time, and there is actually a risk of high temperature operation in the open air above 35 degrees. )

Take Chongqing, the city where I live, for example. Because Chongqing is on the edge of the Yangtze River, the water vapor is abundant, and the draught capacity of the atmosphere increases with the increase of temperature. Usually in July every year, it is so hot that people want to die on the spot.

So usually after 10: 30 in the morning, there are few pedestrians on the street. If there is, in the words of my grandparents, "those children will not die."

Therefore, after the summer heat comes, everyone will try to reduce the frequency of "outdoor work". So what are the hazards of "open-air operation" in summer?

1. Break the heat balance of human body

In short, working in the open air at high temperature will make the human body absorb more heat than it emits. This may break people's physiological balance and affect metabolism to some extent.

2. Affect water and salt metabolism

Generally speaking, working at high temperature will make you sweat a lot. The composition of sweat includes some inorganic salts needed by the body. If these inorganic salts are lost too much, it will lead to imbalance of water and salt in the body, that is, dehydration.

Three. Affect the digestive system

Under the condition of high temperature, by stimulating the nervous system, the secretion of digestive juice will be reduced, which will make people lose their appetite. Working at high temperature for a long time will gradually lose your appetite. And loss of appetite will affect people's nutritional intake. And then produce a bad positive feedback.

Therefore, the frequency of outdoor work should be reduced as much as possible in summer (especially when the temperature is higher than 35 degrees). If it is inevitable to do some outdoor work, you must take measures to prevent sun and heat.