Refers to the weather (climate) state seriously deviating from its average state,
[1] is a statistically difficult event. In layman's terms, extreme weather and climate events refer to small probability events that occur once in 50 years or once in 100 years. With the global warming, the frequency of extreme weather and climate events has changed, showing an increasing trend.
[2] The latest assessment report published by the United Nations Intergovernmental Panel on Climate Change (IPCC) in 2007 shows that extreme weather events, especially extreme events such as heavy rainfall and high temperature heat waves, have shown an increasing trend in the past 50 years. Such extreme events will occur more frequently. The World Meteorological Organization issued a statement on extreme events. Not only did extreme events around the world have increased significantly, they also spread across a wide range, including heavy rainfall in Southeast Asia, an unprecedented severe tropical storm in the Gulf region in June, and heavy rainfall in southern China. And floods, floods in the UK from May to July, heat waves in Southeast Europe and Russia, and unusual snowfalls in some parts of South Africa and South America.