When does the autumn heat wave occur and what causes it?

When is the autumn tiger? Many people don’t know much about it. In fact, the autumn tiger refers to the beginning of autumn, so when is it? It is usually around August 8th. Therefore, the climate changes greatly at this time. Therefore, during this period of time, people can also protect themselves reasonably and avoid some problems.

So when does the autumn heat come ? The following is a detailed introduction so that we can have a good understanding of this problem and know what to do when it occurs. There are also many precautions when it comes to this season.

The term "autumn tiger" in Chinese folk language refers to the short-term return of hot weather after the Beginning of Autumn (around August 8). It usually occurs at the turn of August and September and lasts for about 7-15 days. In meteorology, it means the maximum temperature remains above 35°C for five consecutive days after the solar term of Chushu. The reason for this kind of weather is that the subtropical high pressure, which has retreated to the south, once again controls the Jianghuai and nearby areas, resulting in sunny days and strong sunshine. The hot weather reappears and people feel hot and uncomfortable, so it is called the "autumn tiger".

Causes :

The reason for the formation of the autumn tiger is that the subtropical high pressure in the western Pacific Ocean that controls my country gradually moves southward in autumn, but then moves northward. Under the control of this high pressure, the weather is sunny and cloudless, the sunlight is strong, and the temperature rises. This kind of hot weather is called "Old Woman Summer" in Europe and "Indian Summer" in North America. It’s just the beginning of autumn. "Autumn" includes the Beginning of Autumn, the End of Heat, the White Dew, the Autumnal Equinox, the Cold Dew, and the Frost Descent. After autumn begins, the amount of rain decreases and the air humidity drops below the limit required for people's lives (relative humidity 70%). As a result, the weather becomes dry, the grass and trees gradually wither, and people feel dry. Dryness damages body fluids, which leads to dryness symptoms. Dryness is the main Qi of autumn and is a Yang evil. The diseases it causes include warm dryness (early autumn) and cool dryness (late autumn).

Through the above introduction, we have some understanding of when the autumn tiger occurs, and the reasons for its formation are also explained in detail above. Therefore, at this time, people should make reasonable arrangements in diet and work and rest. This will be of great help in strengthening the physical fitness and making it less likely to get sick.