The correct statement about the high temperature heat wave

High temperature heat wave, also called high temperature heat, is a meteorological term that usually refers to high temperature weather above 35°C that lasts for many days (more than 3 days). Due to the frequent occurrence of high temperature and heat wave weather in recent years, the disasters caused by high temperature have become increasingly serious. To this end, the Chinese Meteorological Department has specially formulated high temperature warning signals to prevent high temperature weather.

The World Meteorological Organization (WMO, World Meteorological Organization) recommends that the standard for high temperature heat waves is: the daily maximum temperature is higher than 32°C and lasts for more than 3 days. The Royal Netherlands Meteorological Institute defines it as: the daily maximum temperature is higher than 25℃ and lasts for more than 5 days, of which at least 3 days the maximum temperature is higher than 30℃.

The meteorological departments of the United States, Canada, Israel and other countries issue high temperature warnings based on the heat index (also called sensible temperature) that takes into account the effects of temperature and relative humidity. For example, the standard for issuing high temperature warnings in the United States is: when the daytime heat index exceeds 40.5°C for 3 hours for two consecutive days or the heat index is expected to exceed 46.5°C at any time, a high temperature warning is issued.

Hazards:

High temperature and heat waves make the human body unable to adapt to the environment and exceed the tolerance limit of the human body, leading to the occurrence or aggravation of diseases and even death. At the same time, high temperature and heat waves can also affect the growth and development of plants and reduce crop yields. High-temperature heat waves will also aggravate the occurrence and development of drought, and the amount of water and electricity used will increase sharply, which will have a great impact on people's lives and production.

In addition, high temperature and heat waves often make people feel irritable and even confused, which can easily lead to public disorder, accidents and casualties, poisonings, fires and other incidents, which are the main consequences of high temperature and heat waves. indirect effects.

Reference for the above content: Baidu Encyclopedia-High Temperature Heat Wave