What does summer heat mean?

What does summer heat mean? Introduction is as follows:

Summer, also known as "dog days", is the expression of the hottest period in our old calendar. Summer heat begins in summer and ends on the third watch. Dog days are the hottest season of the year. The dog days appear in the Gregorian calendar from mid-July to mid-August every year, and its climatic characteristics are high temperature, low pressure, high humidity and low wind speed. V means being forced to hide underground. There are first, middle and last days in the dog days, and the date is determined by the date of solar terms and calendar.

According to China's traditional calculation method, the third and fourth Geng days from summer to the future are the first (head) and middle start dates respectively, and the first Geng day after beginning of autumn is the last first day.

Because every Geng day is 10 days apart, the stipulated time of the first day and the last day is 10 days. Because the third Geng day (the first autumn) after the summer solstice solar term appears sooner or later, the number of days in autumn is long or short, which may be 10 or 20 days.

Tips for heatstroke prevention in dog days

First of all, strenuous outdoor and daytime activities such as mountain climbing are not recommended in summer. It is recommended to choose sports activities such as swimming and jogging in the morning and evening.

Second, drink more boiled water and drink water regularly. Don't wait until you are thirsty. It is not advisable to binge drink after thirst. Drink less juice, soda and other drinks.

Third, in summer, natural people have long activities, sweat a lot and consume a lot. They should eat more nutritious foods such as chicken, duck, lean meat and fish eggs to meet the metabolic needs of the human body.

Fourth, seasonal vegetables in summer, such as lettuce, cucumber, tomato, etc., have high water content; Fresh fruits, such as peaches, apricots, watermelons and melons, have a water content of 80-90% and can be used to replenish water.