In China's meteorology, there are obvious differences between heavy rains. Why is it sultry before the rainstorm?

When it rains heavily, the clouds are low and cover the air like a quilt. If the heat and moisture in the air cannot be dispersed, the air will be sultry. In addition, the sweat on the human body doesn't like to dry, and the sweat can't spread out of the body quickly, so it feels particularly stuffy.

Because of the rich water vapor and high humidity in summer, people will feel sultry when the temperature is not too high (relatively speaking), just like in a steamer. This kind of weather is called muggy and hot. It is also called "sauna day" because when this weather happens, people will feel like they are in a sauna. It often occurs in China's coastal areas, the middle and lower reaches of the Yangtze River and South China.

It will be sultry before it rains. Mitigation measures:

When the weather is hot and difficult, if conditions permit, you can wipe your body with a hot wet towel or take a hot bath. Taking a hot bath will be more conducive to sweating and heat dissipation. Of course, taking a cold bath can also lower the body temperature, but the effect is short-lived. The principle of human perspiration is that the body temperature is higher than the body surface temperature. When it is very hot and humid outside, sweat can't be discharged and it is easy to feel sultry. If you want to sweat, you can run, exercise or drink some hot tea, hot water or hot soup to make your body sweat.

Why is it sultry before the rainstorm?

Rainstorm danger

Rainstorm is one of the main meteorological disasters in China. Long-term rainstorm may produce accumulated water or runoff, inundate low-lying areas and lead to flood disasters. According to the statistics of 1950- 1999, the average flood disaster area in China for many years is 9.424 million hectares, and the affected area of farmland in severe flood years can reach more than130,000 hectares.

Heavy rain is a serious bad weather. Continuous heavy rain or torrential rain or torrential rain in a certain area often leads to flash floods, reservoir dam breaks, river floods, house collapses, farmland inundations, and traffic and communication interruptions, which are harmful to the national economy and people's lives. Life and property. Seriously injured. Rainstorms, especially large-scale continuous rainstorms and concentrated rainstorms, not only affect industrial and agricultural production, but also may endanger people's lives and cause serious economic losses.

Four Characteristics of Summer Rainstorm in China

China is a rainy country. One of the main reasons is that every summer is deeply influenced by the East Asian summer monsoon. The occurrence and prevalence of summer rainstorm coincides with the rainy season or flood season in China, that is, the season with frequent rainstorms. Monsoon air brings rich water vapor and unstable air from the sea surface, which is one of the key reasons for heavy rain.

With the development and popularity of heavy rain in summer, and the rapid or slow northward movement, the main rain belt in China is also moving northward, affecting South China, Jianghuai and North China successively. Time focus. Heavy rains in China mainly occur in the flood season from May to August, and the peak period is from late June to early July, which is a famous rainy season in East Asia. The rainstorm in North China is concentrated from late July to early August, that is, "seven down and eight up".