What is the reason why there has been no rain or snow in many parts of Brazil for decades?

There are many places in Brazil that have not experienced rain and snow for decades. What is the reason? ? In Brazil and many surrounding areas, there has been unprecedented rain and snow weather for many years. The reason is that global warming and urban heat island effect will lead to this extreme rain and snow weather. The 24-hour rainfall in Sao Paulo, Rio de Janeiro and Fairview City exceeds 80~ 100 mm, and other cities have a rare low temperature of 8.2 degrees Celsius in 60 years, accompanied by large-scale snowfall and frost. These weather conditions, which have not appeared for decades, are caused by global warming. Due to global warming and urbanization, heavy rain and frost have occurred in southeastern Brazil and densely populated cities. The 24-hour average precipitation in Rio has exceeded 1.25mm, and the precipitation in the area with the most precipitation is close to 1.50mm, which is an extreme weather event that has never happened in the past 30 years. ?

However, in central and southern Brazil, there has been obvious cooling and precipitation. According to the forecast of the meteorological department, the temperature in Sao Paulo will remain at 8 to 13 degrees Celsius, and will continue to drop. In August, a rare phenomenon of low temperature below zero degrees Celsius occurred in many cities, and a large range of snowfall and frost occurred. Other countries affected by Brazil also experienced a sudden drop in temperature. Due to the severe rainstorm, many urban roads have become Zeguo, and traffic has been seriously blocked. This weather condition is also threatening people's lives.

Brazilian meteorologists believe that this extreme weather phenomenon is related to the global average temperature rise, and the use of cement and the lack of plant cover in big cities make the temperature rise, which is aggravated by this heat island effect and global warming. Moreover, this weather phenomenon will continue to increase. The increase of population, long-term global warming and climate change are all the reasons for this situation.