Are you ready for hot weather? | Updated: 2022-06-10
1. High temperature and climate change
Due to man-made greenhouse gas emissions, great changes have taken place in the climate system, resulting in global warming and more extreme weather and climate events.
The average temperature in China is on the rise, and the Western Pacific subtropical high and the urban heat island effect will also result in or exacerbate regional high temperatures.
Annual change of average temperature in China from 1951 to 2021, issued by the National Climate Center (unit: ℃)
2. Definition and warning signals of heat wave
High-temperature weather in China refers to days when the highest temperature reaches above 35 ℃. China's meteorological authorities stipulate that if the high-temperature weather lasts for more than three days, it can be called a heat wave.
If the highest daily temperature stays above 35 ℃ for three consecutive days, a yellow warning for high temperature will be issued. An orange warning for high temperature will be issued if the highest temperature is expected to rise above 37 ℃ within 24 hours. A red warning for high temperature will be issued if the highest temperature is to rise above 40 ℃ within 24 hours.

Warning signals of a heat wave
3. Precautions for people sensitive to high temperatures 
Children, the elderly, people with chronic diseases and outdoor workers (such as deliverymen) are more susceptible to high temperatures.
Pay attention to weather forecasts and warnings of high temperature in advance.
Do not go out when the temperature is at the highest level. Wear light-colored and  breathable clothes, sunglasses, use sunshades and apply sunscreen when going out, and keep away from direct sunlight.
Replenish water and salt in time. Avoid drinks that are too cold.
Keep to a light diet, eat less high-oil, high-fat, raw and cold food;
Take care of children and do not leave them alone in a closed car.
The elderly, people with chronic diseases or those with a weak constitution should avoid going out at noon and should carry heatstroke prevention medicine. 
Use electric fans or air conditioners to cool down at home, but avoid having cold air directly blown to your face or using fans or air conditioners for too long.