Brief introduction to the characteristics of great summer heat

1, summer heat, the twelfth solar term in the twenty-four solar terms of the China lunar calendar. On July 23rd or 24th every year, the sun reaches longitude 120. At this time, around the Mid-Autumn Festival, most parts of China are the hottest period of the year, and the climate is characterized by: "Dou refers to C as a great summer heat, and the weather in Sri Lanka is very fierce than a small summer heat, so it is called a great summer heat." This is the hottest solar term in the year around midsummer. In many areas of our country, the high temperature of 40 degrees Celsius often occurs. In this extremely hot season, heatstroke prevention and cooling can not be ignored.

There is a lot of rain in this solar term, and there is a proverb of "little summer heat, great summer heat, drowning rats", so we should pay attention to flood control and waterlogging prevention.

3. The ancient summer heat in China is divided into three periods: "Rotten grass is firefly; Second, wait for the soil to moisten and cool off the heat; It will be fine when it rains. " There are more than 2000 species of fireflies in the world, which are divided into aquatic and terrestrial species. Terrestrial fireflies lay eggs on hay, and when it is hot, fireflies ovulate, so the ancients thought fireflies were made of rotten grass. The second weather is that the weather becomes sultry and the land is wet. The third kind of weather is frequent thunderstorm, which weakens the heat and humidity, and the weather begins to transition to beginning of autumn.