202 1 July, 1 1 day. It means to enter the dog days. There is a folk proverb, "The first night falls in summer", which is the basis for establishing the first autumn. The almanac stipulates that "the number of volts starts from the third day of summer", that is to say, "it starts to count down from summer" and begins to fall on the third "Geng Day". The "Geng Day" here refers to the days prefixed with "Geng" in the ancient "Ganzhi Jiri Law".

Dog days specific timetable:

Initial accommodation: July 20265438 +0,1-July 20, 20265438 +0, *** 10 days;

Zhongfu: 2021July 21-2021August 9, ***20 days;

Terminal: 2021August10-2021August 19, *** 10 days.

Is it hot at once?

The weather is very hot, but it is not the hottest time. After lodging, the humidity of the ground becomes higher, and the heat absorbed by the ground is more and more day by day, and the heat emitted is less and less day by day, so the heat accumulated on the ground is hotter and hotter every day. When entering the alto, the heat accumulated on the ground reaches the highest value, and the weather is the hottest.

Tips for sleep heatstroke prevention:

1, the heat dissipation in warm water bath is faster.

Many people think that using cold water to "shower" makes people more comfortable and can cool down. But in fact, using cold water to "shower" when sweating will make the pores of the whole body close quickly, so that the heat in the body can't be distributed and stay in the body, which is easy to cause various diseases. The correct way is to choose warm water bath, because warm water bath dissipates heat faster, and it will make people feel refreshed after bathing.

2. It is not advisable to drink too much after thirst.

Drink water in time in summer, don't wait for thirst to drink water. The scientific way is to drink a cup of cold boiled water (about 200ml) every morning, 2 -3 cups in the morning and 3 -4 cups in the afternoon. You'd better have another drink before going to bed at night. After the old man wakes up in the middle of the night and goes to the toilet, he should drink some water. It's best to drink water several times. Take your time and don't drink too much. After sweating a lot in labor and sports, it is not advisable to drink a lot of white water, and some light salt (sugar) water should be supplemented appropriately, because after sweating a lot, too much salt is lost in the human body, accounting for about 0 or 5% of sweat. If salt is not supplemented in time, the ratio of water to salt in the body will be seriously unbalanced, leading to metabolic disorder.

3. Indoor air convection

Try to make indoor air convection and let the flowing wind cool the house. In addition to saving electricity, it is also good for human health, killing two birds with one stone!

4. Eat more fruits and vegetables and less greasy food.

There are many kinds of vegetables and fruits in summer, which are rich in nutrition. Common bitter gourd, wax gourd, tomato, towel gourd, pumpkin, cucumber and watermelon on the market all have the function of cooling off summer heat. Some dark fruits and vegetables, such as carrots, mangoes, red and yellow tomatoes, contain a lot of carotene and phytochemicals, which help to enhance immunity and supplement vitamins, minerals and dietary fiber. Eating greasy food will increase the burden on the gastrointestinal tract, and people will feel bloating, not thinking about diet and feeling tired. Summer diet should be light and peaceful.

Step 5 drink hot tea

Cold drinks can only relieve summer heat temporarily, but not permanently, while drinking hot tea can stimulate the general relaxation of capillaries, but the body temperature is obviously reduced, which is a simple and excellent folk prescription.