Why is the weather so abnormal in Changsha?

Changsha has a subtropical monsoon climate. It is rainy in late spring and early summer, and dry in late summer and early autumn; Spring is wet and changeable, summer and autumn are sunny, winter is short and summer is hot. The annual frost-free period is about 275 days, and the annual average temperature is 16.8 ~ 17.2℃, the extreme maximum temperature is 40.6℃, and the extreme minimum temperature is-12℃. The annual average total precipitation is 1422.4 mm.

Most importantly, vigorously develop the economy. A lot of environmental damage can also lead to extreme weather. This is the case all over the world now. What's more, this land is Changsha.